Wikipedia:Vital articles/Level 4/Biology and health sciences

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Random level 4 vital article in Biology and health sciences

Vital articles is a list of subjects for which Wikipedia should have correspondingly high-quality articles. It serves as a centralized watchlist to track the status of Wikipedia's most essential articles. This is one of eleven Level 4 sub-lists of ten thousand articles and is currently under construction.

Articles in the Vital list have their assessments labelled as:

• Featured articles
• Former featured articles
• A-class articles
• Good articles
• Delisted good articles
• Failed good article nominees
• B-class articles
• C-class articles
• Start-class articles
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• Unassessed articles

The progress bar is auto-updated via category count, and the symbols and article counts are updated daily by User:cewbot. Please read the FAQ before modifying the article list.

This list is tailored to the English-language Wikipedia. There is also a list of ten thousand articles considered vital to Wikipedias of all languages.

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Total 1,492 articles.

Class	#Articles
FA	100
GA	243
B	470
C	589
LIST	1
FFA	29
DGA	50
Start	89

Biology and health sciences

This section contains 1492 articles.

Biology and health sciences: General

This section contains 45 articles.

Basics

This section contains 16 articles.

1. Life (Level 1)
   1. Death (Level 2)
      1. Decomposition
      2. Suicide (Level 3)
   2. Abiogenesis (Level 3)
   3. Organism (Level 3)
      1. Microorganism
      2. Model organism
2. Biology (Level 2)
   1. Microbiology
   2. Mycology
3. Biomechanics
4. Neuroscience
   1. Sense (Level 3)
5. Paleontology (Level 3)
   1. Fossil

Evolution

This section contains 14 articles.

1. Evolution (Level 2)
   1. Natural selection (Level 3)
   2. Adaptation
   3. Genetic drift
   4. History of life (Level 3)
   5. Mutation
2. Human evolution (Level 3)
   1. Australopithecus
   2. Homo habilis
   3. Homo erectus
   4. Cro-Magnon
   5. Denisovan
   6. Neanderthal
   7. Paranthropus

Genetics and taxonomy

This section contains 15 articles.

1. Genetics (Level 3)
   1. Gene (Level 3)
   2. Genetic code
   3. Gene expression
   4. Heredity (Level 3)
   5. Epigenetics
   6. Human genome
   7. Hybrid
   8. Mendelian inheritance
2. Phylogenetics
   1. Binomial nomenclature
   2. Taxonomy (Level 3)
      1. Domain
      2. Kingdom
      3. Species (Level 3)

Anatomy and morphology

This section contains 128 articles.

Basics

This section contains 5 articles.

1. Anatomy (Level 3)
2. Dissection
3. Organ
4. Tissue
5. Sexual dimorphism

Animal

This section contains 101 articles.

Animal: General

This section contains 10 articles.

1. Endocrine system
   1. Adrenal gland
   2. Thyroid
2. Gland
3. Immune system (Level 3)
   1. Antibody
4. Abdomen
5. Head
6. Thorax
7. Venom

Circulatory system

This section contains 10 articles.

1. Circulatory system (Level 3)
2. Artery
3. Blood (Level 3)
   1. Red blood cell
   2. White blood cell
4. Capillary
5. Heart (Level 3)
6. Lymphatic system
7. Spleen
8. Vein

Digestive system

This section contains 8 articles.

1. Mouth
   1. Tongue
2. Esophagus
3. Stomach
4. Small intestine
5. Large intestine
6. Liver (Level 3)
7. Pancreas

Muscular system

This section contains 4 articles.

1. Muscular system
2. Muscle cell
3. Sarcomere
4. Skeletal muscle

Nervous system

This section contains 27 articles.

1. Nervous system (Level 3)
2. Central nervous system
3. Neuron
4. Brain (Level 3)
   1. Brainstem
   2. Cerebellum
   3. Cerebral cortex
   4. Cerebrum
5. Spinal cord
6. Peripheral nervous system
   1. Ganglion
7. Sensory nervous system
8. Auditory system
   1. Ear (Level 3)
   2. Hearing
9. Taste
10. Olfactory system
    1. Nose
    2. Sense of smell
       1. Odor
11. Somatosensory system
    1. Pain
12. Visual system
    1. Eye (Level 3)
       1. Compound eye
    2. Visual perception
       1. Color vision

Integumentary system

This section contains 11 articles.

1. Integumentary system
2. Breast
3. Feather
4. Fingerprint
5. Fur
6. Hair
   1. Whiskers
7. Nail (anatomy)
8. Scale (zoology)
9. Skin (Level 3)
10. Stinger

Reproductive system

This section contains 11 articles.

1. Reproductive system
2. Sex organ
3. Female reproductive system
   1. Clitoris
   2. Ovary
   3. Placenta
   4. Uterus
   5. Vagina
4. Male reproductive system
   1. Penis
   2. Testicle

Respiratory system

This section contains 3 articles.

1. Respiratory system
2. Gill
3. Lung (Level 3)

Skeletal system

This section contains 7 articles.

1. Skeleton (Level 3)
2. Bone (Level 3)
3. Jaw
4. Joint
5. Pelvis
6. Skull
7. Spinal column

Urinary system

This section contains 3 articles.

1. Bladder
2. Kidney
3. Urinary system

Tissues

This section contains 7 articles.

1. Connective tissue
   1. Cartilage
   2. Ligament
   3. Tendon
2. Epithelium
3. Muscle (Level 3)
4. Nervous tissue

Plant

This section contains 20 articles.

Plant: General

This section contains 12 articles.

1. Plant anatomy
2. Plant morphology
3. Flower (Level 3)
4. Fruit (Level 3)
   1. Berry
   2. Nut
5. Leaf
6. Root
7. Stoma
8. Seed (Level 3)
9. Shrub
10. Tree (Level 3)

Plant stem

This section contains 3 articles.

1. Plant stem
2. Bark
3. Trunk

Plant tissues

This section contains 5 articles.

1. Epidermis
2. Ground tissue
3. Meristem
4. Vascular tissue
5. Vascular cambium

Fungus

This section contains 2 articles.

1. Hypha
2. Mycelium

Biochemistry and molecular biology

This section contains 45 articles.

1. Biochemistry (Level 3)
2. Chemical biology
3. Molecular biology (Level 3)
4. Biomolecule
5. Alkaloid
   1. Caffeine
   2. Cocaine
   3. Morphine
   4. Nicotine
6. Biological pigment
   1. Carotenoid
   2. Chlorophyll
   3. Melanin
7. Carbohydrate (Level 3)
   1. Sugars
      1. Fructose
      2. Glucose
      3. Lactose
   2. Polysaccharides
      1. Cellulose
      2. Chitin
      3. Glycogen
      4. Starch
8. Hormone (Level 3)
   1. Adrenaline
   2. Dopamine
   3. Estrogen
   4. Insulin
   5. Neurotransmitter
   6. Oxytocin
   7. Plant hormone
   8. Testosterone
9. Pheromone
10. Lipid (Level 3)
    1. Steroid
       1. Cholesterol
    2. Fat
    3. Fatty acid
11. Nucleic acid
    1. Adenosine triphosphate
    2. DNA (Level 3)
    3. RNA (Level 3)
12. Protein (Level 3)
    1. Amino acid
    2. Enzyme
    3. Hemoglobin
    4. Protein (nutrient)

Biological processes and physiology

This section contains 53 articles.

Basics

This section contains 13 articles.

1. Physiology (Level 3)
2. Blood sugar level
3. Breathing (Level 3)
4. Circadian rhythm
5. Digestion (Level 3)
6. Excretion
   1. Defecation
7. Metabolism (Level 3)
8. Muscle contraction
9. Photosynthesis (Level 3)
10. Respiration
11. Thermoregulation
12. Transpiration

Biological reproduction

This section contains 9 articles.

1. Reproduction (Level 2)
2. Asexual reproduction
3. Sexual reproduction
   1. Biological sex (Level 3)
   2. Female
   3. Male
   4. Fertilisation
4. Microbial cyst
5. Spore

Animal reproduction

This section contains 9 articles.

1. Birth
2. Childbirth
3. Egg (Level 3)
4. Egg cell
5. Menstrual cycle
6. Menopause
7. Pregnancy (Level 3)
8. Semen
9. Sperm

Plant reproduction

This section contains 7 articles.

1. Plant reproduction
2. Alternation of generations
3. Gametophyte
4. Plant reproductive morphology
5. Pollen
6. Pollination
7. Sporophyte

Development

This section contains 2 articles.

1. Developmental biology
2. Development of the human body

Animal ontogeny

This section contains 13 articles.

1. Cuticle
2. Embryo
3. Fetus
4. Imago
5. Larva
6. Longevity
7. Metamorphosis
8. Moulting
9. Nymph
10. Ontogeny
11. Puberty
12. Pupa
13. Tadpole

Botany

This section contains 3 articles.

1. Botany (Level 3)
2. Carnivorous plant
3. Weed

Cell biology

This section contains 36 articles.

Cell biology: General

This section contains 1 article.

1. Cell biology

Cell processes

This section contains 10 articles.

1. Active transport
2. Cell signaling
3. Cellular respiration
   1. Glycolysis
4. DNA replication
5. Fermentation
6. Programmed cell death
7. Stem cell
8. Transcription
9. Translation (biology)

Cellular division

This section contains 5 articles.

1. Cell cycle
2. Fission
3. Meiosis
4. Mitosis
5. Plasmid

Organelles and other cell parts

This section contains 16 articles.

1. Cell (Level 2)
2. Cell membrane
3. Cytoplasm
4. Cytoskeleton
5. Flagellum
6. Symbiogenesis
7. Organelle
8. Cell nucleus
   1. Chromosome
9. Centriole
10. Endoplasmic reticulum
11. Golgi apparatus
12. Lysosome
13. Mitochondrion
14. Ribosome
15. Vacuole

Plant cells

This section contains 4 articles.

1. Plant cell
2. Cell wall
3. Chloroplast
4. Plastid

Ecology

This section contains 17 articles.

1. Ecology (Level 2)
2. Biodiversity (Level 3)
3. Biome
4. Biosphere
5. Competition (biology)
6. Ecological niche
7. Ecosystem (Level 3)
8. Extinction (Level 3)
   1. Endangered species
9. Extremophile
10. Habitat
11. Invasive species
12. Parasitism
13. Population (biology)
14. Sustainability
15. Symbiosis
16. Wildlife conservation

Zoology

This section contains 18 articles.

Zoology: General

This section contains 3 articles.

1. Zoology (Level 3)
2. Animal coloration
   1. Camouflage

Ethology

This section contains 15 articles.

1. Ethology
2. Intelligence (Level 3)
3. Sleep (Level 3)
   1. Hibernation
4. Animal locomotion
   1. Bipedalism
5. Animal migration
6. Carnivore
   1. Predation
   2. Scavenger
7. Herbivore
   1. Grazing
8. Instinct
9. Sociality
   1. Herd

Organisms

This section contains 861 articles.

1. Eukaryote (Level 3)
2. Algae (Level 3)
3. Lichen
4. Plankton

Animals

This section contains 557 articles.

1. Animal (Level 2)

General classification

This section contains 3 articles.

1. Bilateria
2. Chordate
3. Invertebrate

Cnidarians

This section contains 3 articles.

1. Cnidaria
2. Coral
3. Jellyfish

Echinoderms

This section contains 4 articles.

1. Echinoderm
2. Sea cucumber
3. Sea urchin
4. Starfish

Mollusks

This section contains 7 articles.

1. Mollusca (Level 3)
2. Bivalvia
   1. Oyster
   2. Scallop
3. Octopus
4. Squid
5. Gastropod

Porifera

This section contains 1 article.

1. Sponge

Arthropods

This section contains 86 articles.

1. Arthropod (Level 3)

Arachnids

This section contains 8 articles.

1. Arachnid
2. Mite
3. Pseudoscorpion
4. Scorpion
5. Spider
   1. Jumping spider
   2. Tarantula
6. Tick

Crustaceans

This section contains 10 articles.

1. Crustacean (Level 3)
2. Decapod
   1. Crab
   2. Crayfish
   3. Lobster
   4. Shrimp
3. Krill
4. Malacostraca
5. Ostracod
6. Woodlouse

Insects and other hexapods

This section contains 60 articles.

1. Hexapoda
2. Springtail
3. Insect (Level 3)
   1. Pterygota
4. Cockroach
5. Earwig
6. Flea
7. Louse
   1. Body louse
8. Mantis
9. Phasmatodea
10. Termite

Beetles (Coleoptera)

This section contains 5 articles.

1. Beetle
2. Coccinellidae
3. Dung beetle
4. Firefly
5. Weevil

Flies (Diptera)

This section contains 10 articles.

1. Fly
2. Common fruit fly
3. Black fly
4. Botfly
5. Crane fly
6. Calliphoridae
7. Tabanidae
8. Housefly
9. Mosquito
10. Tsetse fly

Hemiptera (true bugs)

This section contains 7 articles.

1. Hemiptera
2. Cicada
3. Bed bug
4. Leafhopper
5. Aphid
6. Scale insect
7. Whitefly

Hymenoptera

This section contains 10 articles.

1. Hymenoptera
2. Ant
   1. Fire ant
   2. Carpenter ant
3. Bee
   1. Bumblebee
   2. Africanized bee
   3. Western honey bee
4. Wasp
   1. Hornet

Lepidoptera

This section contains 7 articles.

1. Lepidoptera
2. Butterfly
3. Bombyx mori
4. Geometer moth
5. Moth
6. Pieris brassicae
7. Swallowtail butterfly

Odonata

This section contains 3 articles.

1. Odonata
2. Damselfly
3. Dragonfly

Orthoptera

This section contains 6 articles.

1. Orthoptera
2. Cricket (insect)
3. Grasshopper
4. Mole cricket
5. Locust
6. Tettigoniidae

Arthropoda, others

This section contains 7 articles.

1. Trilobite

Myriapoda

This section contains 3 articles.

1. Myriapoda
   1. Centipede
   2. Millipede

Chelicerata

This section contains 3 articles.

1. Chelicerata
2. Eurypterid
3. Xiphosura

Invertebrates, others

This section contains 10 articles.

Ecdysozoa

This section contains 3 articles.

1. Nematode
   1. Caenorhabditis elegans
2. Tardigrade

Lophotrochozoa

This section contains 5 articles.

1. Annelid
   1. Earthworm
   2. Leech
   3. Polychaete
2. Bryozoa

Platyzoa

This section contains 2 articles.

1. Flatworm
   1. Cestoda

Vertebrates

This section contains 425 articles.

Vertebrates, general classification

This section contains 3 articles.

1. Vertebrate (Level 3)
2. Gnathostomata
3. Tetrapod

Agnatha

This section contains 4 articles.

1. Agnatha
2. Hagfish
3. Lamprey
4. Ostracoderm

Fishes

This section contains 84 articles.

1. Fish (Level 3)
2. Coral reef fish
3. Deep-sea fish
4. Chondrichthyes
5. Acanthodii
6. Osteichthyes
   1. Actinopterygii
   2. Sarcopterygii
      1. Coelacanth
      2. Lungfish
7. Placoderm
8. Anglerfish
9. Arapaima
10. Chimaera
11. Eel
12. Electric eel
13. Flying fish
14. Milkfish
15. Northern pike
16. Oarfish
17. Mullet
18. Ophidiiformes
19. Scorpaeniformes
20. Stickleback

Batoidea

This section contains 6 articles.

1. Batomorphi
2. Stingray
3. Manta ray
4. Skate
5. Sawfish
6. Electric ray

Acanthomorpha

This section contains 28 articles.

1. Perciformes
2. Barracuda
3. Cichlid
   1. Tilapia
4. Cyprinodontiformes
   1. Guppy
5. Flatfish
   1. Plaice
   2. Turbot
6. Gadidae
   1. Alaska pollock
   2. Cod
   3. Haddock
7. Gobioidei
8. Mackerel
9. Marlin
10. Mahi-mahi
11. Serranidae
    1. European seabass
    2. Grouper
12. Seahorse
13. Siamese fighting fish
14. Swordfish
15. Perch
16. Remora
17. Tetraodontiformes
    1. Ocean sunfish
    2. Tetraodontidae
18. Tuna
19. Wrasse

Characiformes

This section contains 2 articles.

1. Characiformes
2. Piranha

Chondrosteans

This section contains 2 articles.

1. Bichir
2. Sturgeon

Clupeiformes

This section contains 5 articles.

1. Anchovy
2. Herring
3. Ilish
4. Sardine
5. Sprat

Cypriniformes

This section contains 4 articles.

1. Cypriniformes
   1. Carp
   2. Goldfish
   3. Koi

Osmeriformes

This section contains 2 articles.

1. Galaxiidae
2. Smelt

Salmoniformes

This section contains 3 articles.

1. Salmonidae
2. Salmon
3. Trout

Sharks

This section contains 6 articles.

1. Shark
2. Great white shark
3. Hammerhead shark
4. Tiger shark
5. Nurse shark
6. Whale shark

Siluriformes

This section contains 2 articles.

1. Catfish
2. Loricariidae

Amphibians

This section contains 10 articles.

1. Amphibian (Level 3)
2. Caecilian
3. Salamander
   1. Newt
4. Frog
   1. Hylidae
   2. Leptodactylidae
   3. True toad
   4. Ranidae
      1. American bullfrog

Reptiles

This section contains 47 articles.

1. Reptile (Level 3)
2. Crocodilia
   1. Alligator
   2. Caiman
   3. Crocodile
3. Lizard
   1. Chameleon
   2. Gecko
   3. Gila monster
   4. Green iguana
   5. Horned lizard
   6. Komodo dragon
   7. Skink
4. Snake
   1. Eastern copperhead
   2. Agkistrodon piscivorus
   3. Boidae
   4. Coral snake
   5. Garter snake
   6. Sea snake
   7. Mamba
   8. Naja
   9. Rattlesnake
   10. Adder
5. Tuatara
6. Turtle
   1. Alligator snapping turtle
   2. Box turtle
   3. Common snapping turtle
   4. Painted turtle
   5. Red-eared slider
   6. Sea turtle
   7. Tortoise
      1. Galápagos tortoise

Dinosaurs and prehistoric reptiles

This section contains 13 articles.

1. Dinosaur (Level 3)
   1. Allosaurus
   2. Iguanodon
   3. Sauropoda
      1. Diplodocus
   4. Stegosaurus
   5. Triceratops
   6. Tyrannosaurus
   7. Velociraptor
2. Plesiosaur
3. Pterosaur
4. Synapsida
   1. Dimetrodon

Birds

This section contains 116 articles.

General articles

This section contains 5 articles.

1. Bird (Level 3)
2. Seabird
3. Bird of prey
4. Palaeognathae
5. Archaeopteryx

Accipitriformes and Falconiformes

This section contains 9 articles.

1. Accipiter
2. Eagle
   1. Golden eagle
3. Falcon
   1. Peregrine falcon
4. New World vulture
5. Old World vulture
6. Osprey
7. Secretarybird

Anseriformes

This section contains 4 articles.

1. Duck
   1. Mallard
2. Goose
3. Swan

Apodiformes

This section contains 2 articles.

1. Hummingbird
2. Swift

Caprimulgiformes

This section contains 1 article.

1. Nightjar

Charadriiformes

This section contains 4 articles.

1. Auk
2. Gull
3. Sandpiper
4. Tern

Columbiformes

This section contains 4 articles.

1. Columbidae
   1. Dodo
   2. Passenger pigeon
   3. Rock dove

Coraciiformes

This section contains 3 articles.

1. River kingfisher
2. Hornbill
3. Hoopoe

Cuculiformes

This section contains 3 articles.

1. Cuckoo
2. Hoatzin
3. Turaco

Galliformes

This section contains 8 articles.

1. Galliformes
2. Chicken (Level 3)
3. Grouse
4. Guinea fowl
5. Peafowl
6. Common pheasant
7. Common quail
8. Domestic turkey

Gaviiformes

This section contains 1 article.

1. Loon

Gruiformes

This section contains 4 articles.

1. Gruiformes
2. Crane (bird)
3. Bustard
4. Rail

Passerines

This section contains 2 articles.

1. Passerine
2. Songbird

Corvoidea

This section contains 8 articles.

1. Bird-of-paradise
2. Corvidae
   1. Corvus
      1. Common raven
   2. Eurasian magpie
3. Honeyeater
4. Lyrebird
5. Shrike

Passerida

This section contains 23 articles.

1. Bulbul
2. Cardinalidae
3. Finch
4. Icterid
   1. Red-winged blackbird
5. Lark
6. Mockingbird
7. New World warbler
8. Old World flycatcher
   1. European robin
   2. Common nightingale
9. Ploceidae
10. Old World sparrow
    1. House sparrow
11. Starling
    1. Common myna
    2. Common starling
12. Sunbird
13. Swallow
14. Tit
15. Thrush
    1. American robin
16. Wren

Tyranni

This section contains 3 articles.

1. Antbird
2. Ovenbird (family)
3. Tyrant flycatcher

Pelecanimorphae

This section contains 9 articles.

1. Cormorant
2. Darter
3. Frigatebird
4. Heron
5. Ibis
6. Pelican
7. Shoebill
8. Stork
9. Sulidae

Phoenicopteriformes

This section contains 1 article.

1. Flamingo

Piciformes

This section contains 3 articles.

1. Honeyguide
2. Toucan
3. Woodpecker

Procellariiformes

This section contains 2 articles.

1. Procellariiformes
2. Albatross

Psittaciformes

This section contains 4 articles.

1. Parrot
2. Ara
3. Budgerigar
4. Cockatoo

Ratites

This section contains 6 articles.

1. Cassowary
2. Emu
3. Kiwi
4. Moa
5. Common ostrich
6. Rhea

Sphenisciformes

This section contains 1 article.

1. Penguin

Strigiformes

This section contains 3 articles.

1. Owl
   1. Eurasian eagle-owl
   2. Tyto

Tinamiformes

This section contains 1 article.

1. Tinamou

Trogoniformes

This section contains 2 articles.

1. Trogon
2. Resplendent quetzal

Mammals

This section contains 161 articles.

1. Mammal (Level 3)
2. Aardvark
3. Armadillo
4. Hyrax
5. Pangolin
6. Sirenia

Bats

This section contains 5 articles.

1. Bat
2. Megabat
3. Microbat
4. Pteropus
5. Vampire bat

Carnivora

This section contains 35 articles.

1. Carnivora
2. Bear
   1. Brown bear
   2. Giant panda
   3. Polar bear
3. Canidae
   1. Dog (Level 3)
      1. Dingo
   2. Coyote
   3. Fox
   4. Jackal
   5. Wolf
4. Felidae
   1. Cat (Level 3)
   2. Cheetah
   3. Cougar
   4. Jaguar
   5. Leopard
   6. Lion
   7. Lynx
   8. Snow leopard
   9. Tiger
5. Hyena
6. Mongoose
7. Mustelidae
   1. European badger
   2. Honey badger
   3. Marten
   4. Otter
   5. Sea otter
   6. Stoat
   7. Weasel
   8. Wolverine
8. Procyonidae
9. Skunk

Cetaceans

This section contains 8 articles.

1. Cetacean
2. Whale
3. Blue whale
4. Dolphin
5. Humpback whale
6. Orca
7. Porpoise
8. Sperm whale

Erinaceids

This section contains 1 article.

1. Hedgehog

Artiodactyla

This section contains 37 articles.

1. Artiodactyla
2. Ruminant
3. Alpaca
4. Bovidae
   1. African buffalo
   2. American bison
   3. Antelope
   4. Aurochs
   5. Capra
   6. Cattle (Level 3)
   7. Gazelle
   8. Gaur
   9. Goat
   10. Impala
   11. Muskox
   12. Sheep (Level 3)
   13. Water buffalo
   14. Wildebeest
   15. European bison
   16. Yak
5. Camel
   1. Bactrian camel
   2. Dromedary
6. Deer
   1. Elk
   2. Moose
   3. Red deer
   4. Reindeer
7. Llama
8. Giraffe
9. Guanaco
10. Hippopotamus
11. Peccary
12. Pig (Level 3)
13. Pronghorn
14. Vicuña
15. Wild boar

Lagomorphs

This section contains 3 articles.

1. Lagomorpha
2. Hare
3. Rabbit

Marsupials

This section contains 8 articles.

1. Marsupial
2. Diprotodontia
   1. Kangaroo
   2. Koala
3. Dasyuromorphia
   1. Tasmanian devil
4. Opossum
5. Peramelemorphia

Monotremes

This section contains 3 articles.

1. Monotreme
2. Echidna
3. Platypus

Perissodactyla

This section contains 7 articles.

1. Perissodactyla
2. Donkey
3. Equidae
4. Horse (Level 3)
5. Rhinoceros
6. Tapir
7. Zebra

Pilosa

This section contains 2 articles.

1. Anteater
2. Sloth

Pinnipeds

This section contains 4 articles.

1. Pinniped
2. Eared seal
3. Earless seal
4. Walrus

Primates

This section contains 22 articles.

1. Primate (Level 3)
2. Monkey
3. Ape
   1. Chimpanzee
   2. Bonobo
   3. Gibbon
   4. Gorilla
   5. Orangutan
   6. Homo
      1. Human (Level 1)
4. New World monkey
   1. Capuchin monkey
   2. Spider monkey
5. Old World monkey
   1. Baboon
   2. Macaque
   3. Rhesus macaque
6. Strepsirrhini
   1. Slow loris
   2. Galago
   3. Lemur
7. Tarsier

Proboscidea

This section contains 3 articles.

1. Proboscidea
2. Elephant
3. Mammoth

Rodents

This section contains 15 articles.

1. Rodent (Level 3)
2. Capybara
3. Nutria
4. Beaver
5. Dormouse
6. Guinea pig
7. Hamster
8. Marmot
9. Mouse
10. Muridae
11. Muskrat
12. Porcupine
13. Rat
    1. Brown rat
14. Squirrel

Soricomorpha

This section contains 2 articles.

1. Shrew
   1. Mole (animal)

Animal breeds and hybrids

This section contains 17 articles.

Cats

This section contains 1 article.

1. Siamese cat

Cattle

This section contains 3 articles.

1. American Brahman
2. Hereford cattle
3. Holstein Friesian

Dogs

This section contains 6 articles.

1. Gun dog
2. Herding dog
3. Hound
4. Mastiff
5. Spitz
6. Terrier

Horses

This section contains 5 articles.

1. Arabian horse
2. Andalusian horse
3. Friesian horse
4. Thoroughbred
5. Pony

Hybrids

This section contains 1 article.

1. Mule

Sheep

This section contains 1 article.

1. Merino

Plants

This section contains 260 articles.

1. Plant (Level 2)

Non-flowering plants

This section contains 25 articles.

Green algae

This section contains 3 articles.

1. Green algae
2. Charophyta
3. Chlorophyta

Bryophytes

This section contains 5 articles.

1. Bryophyte
2. Hornwort
3. Liverwort
4. Moss
   1. Sphagnum

Pteridophytes

This section contains 4 articles.

1. Pteridophyte
2. Fern
   1. Equisetum
3. Lycophyte

Gymnosperms

This section contains 13 articles.

1. Gymnosperm
2. Cycad
3. Ginkgo biloba

Pinophyta (conifers) (10 articles)

1. Conifer
2. Cedrus
3. Cupressus
4. Douglas fir
5. Fir
6. Juniper
7. Pine
8. Podocarpus
9. Sequoioideae
10. Spruce

Flowering plants

This section contains 234 articles.

1. Flowering plant

Magnoliids

This section contains 5 articles.

1. Magnoliids
2. Avocado
3. Black pepper
4. Cinnamon
5. Nutmeg

Monocots

This section contains 59 articles.

1. Monocotyledon
2. Alismatales
   1. Araceae
      1. Anthurium
      2. Philodendron
      3. Taro
3. Arecaceae
   1. Coconut
   2. Date palm
4. Asparagales
   1. Agave
   2. Allium
      1. Garlic
      2. Leek
      3. Onion
   3. Aloe
   4. Amaryllis
   5. Asparagus
   6. Gladiolus
   7. Iridaceae
      1. Iris
      2. Saffron
   8. Lily of the valley
   9. Narcissus
   10. Orchid
       1. Vanilla
   11. Yucca
5. Pontederia crassipes
6. Yam
7. Liliales
   1. Alstroemeria
   2. Colchicum
   3. Liliaceae
      1. Lilium
      2. Tulip
8. Pandanales
   1. Pandanus
9. Zingiberales
   1. Arrowroot
   2. Banana
      1. Cooking banana
   3. Canna
   4. Cardamom
   5. Ginger
   6. Heliconia

Poales

This section contains 20 articles.

1. Bromeliaceae
   1. Puya
   2. Spanish moss
   3. Pineapple
2. Cyperaceae
3. Juncus
4. Poaceae
   1. Bamboo
   2. Barley
   3. Maize (Level 3)
   4. Millet
   5. Oat
   6. Rice (Level 3)
      1. Oryza sativa
   7. Rye
   8. Sorghum
   9. Sugarcane
   10. Wheat (Level 3)
       1. Common wheat
5. Typha

Eudicots

This section contains 169 articles.

1. Eudicots

Apiales

This section contains 10 articles.

1. Apiaceae
   1. Anise
   2. Carrot
   3. Celery
   4. Cumin
   5. Fennel
   6. Parsley
   7. Parsnip
2. Ginseng
3. Hedera

Asterales

This section contains 14 articles.

1. Asteraceae
   1. Artichoke
   2. Bellis perennis
   3. Chicory
   4. Chrysanthemum
   5. Cirsium
   6. Dahlia
   7. Lettuce
   8. Solidago
   9. Helianthus
   10. Sonchus
   11. Tagetes
   12. Taraxacum
2. Campanulaceae

Brassicales

This section contains 17 articles.

1. Brassicaceae
   1. Arabidopsis thaliana
   2. Brassica oleracea
      1. Broccoli
      2. Cabbage
      3. Cauliflower
      4. Collard (plant)
      5. Kale
      6. Kohlrabi
   3. Eruca sativa
   4. Horseradish
   5. Radish
      1. Daikon
   6. Rapeseed
   7. Rutabaga
   8. Tropaeolum
   9. Turnip
2. Papaya

Caryophyllales

This section contains 8 articles.

1. Amaranthaceae
   1. Amaranth
   2. Beetroot
   3. Chard
   4. Spinach
   5. Sugar beet
   6. Quinoa
2. Cactus
3. Buckwheat

Cucurbitales

This section contains 7 articles.

1. Cucurbitaceae
   1. Cucumis melo
   2. Cucumber
   3. Cucurbita
      1. Pumpkin
      2. Zucchini
   4. Watermelon

Ericales

This section contains 12 articles.

1. Brazil nut
2. Diospyros
3. Ericaceae
   1. Blueberry
   2. Cranberry
   3. Rhododendron
      1. Azalea
4. Theaceae
   1. Camellia
5. Impatiens
6. Kiwifruit
7. Primulaceae

Fabales

This section contains 14 articles.

1. Fabaceae
   1. Bean (Level 3)
   2. Chickpea
   3. Green bean
   4. Lentil
   5. Lima bean
   6. Liquorice
   7. Mimosa
   8. Pea
   9. Peanut
   10. Phaseolus vulgaris
   11. Soybean
   12. Tamarind
   13. Vicia faba

Fagales

This section contains 9 articles.

1. Alder
2. Beech
3. Birch
4. Chestnut
5. Hazelnut
6. Hickory
7. Oak
8. Pecan
9. Walnut

Lamiales

This section contains 11 articles.

1. Lamiaceae
   1. Basil
   2. Lavandula
   3. Mentha
   4. Salvia
   5. Thyme
2. Oleaceae
   1. Fraxinus
   2. Olive
3. Sesame
4. Verbena

Malpighiales

This section contains 7 articles.

1. Euphorbiaceae
   1. Cassava
   2. Poinsettia
2. Flax
3. Hypericum
4. Viola
5. Willow

Myrtales

This section contains 6 articles.

1. Henna
2. Myrtaceae
   1. Clove
   2. Eucalyptus
   3. Guava
3. Pomegranate

Rosales

This section contains 20 articles.

1. Cannabis
2. Elm
3. Moraceae
   1. Breadfruit
   2. Ficus sycomorus
   3. Fig
   4. Jackfruit
   5. Morus
4. Rosaceae
   1. Almond
   2. Apple
   3. Apricot
   4. Blackberry
   5. Cherry
   6. Peach
   7. Pear
   8. Plum
   9. Raspberry
   10. Rose
   11. Strawberry

Sapindales

This section contains 12 articles.

1. Citrus
   1. Grapefruit
   2. Kumquat
   3. Lemon
   4. Lime
   5. Orange
   6. Mandarin orange
2. Cashew
3. Lychee
4. Mahogany
5. Mango
6. Maple

Solanales

This section contains 7 articles.

1. Solanaceae
   1. Bell pepper
   2. Chili pepper
   3. Eggplant
   4. Potato (Level 3)
   5. Tomato
2. Sweet potato

Others

This section contains 14 articles.

1. Cornus
2. Gentianales
   1. Apocynaceae
   2. Rubiaceae
      1. Gardenia
3. Malvaceae
   1. Adansonia
   2. Durian
   3. Okra
4. Proteales
   1. Proteaceae
      1. Macadamia
   2. Nelumbo
   3. Platanus
5. Blackcurrant
6. Grape

Fungi

This section contains 15 articles.

1. Fungus (Level 3)
2. Mushroom
3. Yeast
   1. Saccharomyces cerevisiae
4. Ascomycota
5. Basidiomycota
6. Zygomycota

Edible fungi

This section contains 6 articles.

1. Agaricus
2. Boletus edulis
3. Chanterelle
4. Pleurotus ostreatus
5. Shiitake
6. Truffle

Poisonous fungi

This section contains 2 articles.

1. Amanita muscaria
2. Amanita phalloides

Other eukaryotes

This section contains 18 articles.

1. Alveolate
   1. Dinoflagellate
   2. Paramecium
2. Amoebozoa
3. Chromalveolata
   1. Stramenopile
      1. Brown algae
         1. Kelp
      2. Diatom
   2. Haptophyte
   3. Cryptomonad
4. Excavata
   1. Euglenozoa
5. Protist
6. Seaweed
7. Slime mold
8. Rhizaria
9. Red algae

Prokaryotes

This section contains 7 articles.

1. Prokaryote
   1. Archaea (Level 3)
   2. Bacteria (Level 3)
      1. Cyanobacteria
      2. Escherichia coli
      3. Salmonella
      4. Staphylococcus aureus

Health, medicine and disease

This section contains 286 articles.

Health and fitness

This section contains 24 articles.

1. Health (Level 3)
   1. Mental health (Level 3)
2. Nutrition (Level 3)
   1. Diet
   2. Dietary supplement
   3. Food group
   4. Malnutrition
   5. Vitamin (Level 3)
3. Hygiene (Level 3)
   1. Bathing
   2. Feminine hygiene
   3. Oral hygiene
   4. Shaving
4. Physical fitness
   1. Body mass index
   2. Exercise (Level 3)
   3. Obesity (Level 3)
   4. Weight loss
5. Ageing (Level 3)
6. Breastfeeding
7. Infertility
8. Occupational safety and health
   1. Personal protective equipment
9. Stress (biology)

Drugs and pharmacology

This section contains 36 articles.

1. Medication (Level 3)
   1. Vaccine (Level 3)
      1. Vaccination
      2. Vaccine hesitancy
      3. Smallpox vaccine
      4. Polio vaccine
   2. Prescription drug
   3. Amphetamine
   4. Analgesic
   5. Anesthesia (Level 3)
   6. Antibiotic (Level 3)
      1. Penicillin
   7. Aspirin
   8. Benzodiazepine
   9. Quinine
2. Drug (Level 3)
   1. Alcohol (drug)
      1. Alcohol intoxication
   2. Stimulant
   3. Tobacco
   4. Cannabis
   5. Opium
3. Substance use disorder
   1. Addiction (Level 3)
   2. Alcoholism
   3. Recreational drug use
   4. Smoking (Level 3)
      1. Cigarette
      2. Health effects of smoking tobacco
      3. Smoking cessation
   5. Substance dependence
4. Pharmacology
   1. Pharmacokinetics
   2. Placebo
5. Pharmacy
   1. Pharmacist

Medicine

This section contains 86 articles. See also "Biology" for e.g. anatomy

General concepts

This section contains 11 articles.

1. Medicine (Level 2)
   1. Emergency medical services
   2. First aid
   3. Health care
   4. Veterinary medicine
   5. Medical ethics
2. Hospital (Level 3)
   1. Emergency department
   2. Psychiatric hospital
3. Medical doctor
   1. Nursing (Level 3)

Human anatomy

This section contains 13 articles.

1. Human body (Level 3)
   1. Arm
   2. Face
   3. Foot
   4. Hand
      1. Finger
   5. Human brain
   6. Human eye
   7. Gastrointestinal tract
   8. Human leg
   9. Human skeleton
   10. Human tooth
   11. Human voice

Dentistry

This section contains 5 articles.

1. Dentistry (Level 3)
   1. Dental restoration
   2. Root canal
   3. Toothache
   4. Tooth decay

Fields of medicine

This section contains 25 articles.

1. Angiology
2. Cardiology
3. Dermatology
4. Gastroenterology
5. Geriatrics
6. Hematology
   1. Blood type
7. Immunology
8. Neurology
9. Obstetrics and gynaecology
10. Oncology
11. Ophthalmology
12. Optometry
13. Otorhinolaryngology
14. Pediatrics
15. Psychiatry
16. Public health
    1. Epidemiology
    2. Life expectancy
    3. Preventive healthcare
17. Pulmonology
18. Radiology
19. Sexual and reproductive health
20. Toxicology
21. Urology

Alternative and traditional medicine

This section contains 7 articles.

1. Quackery
2. Alternative medicine
   1. Herbal medicine
3. Traditional medicine
   1. Ayurveda
   2. Traditional Chinese medicine
      1. Acupuncture

Medical procedures

This section contains 25 articles.

1. Abortion (Level 3)
2. Surgery (Level 3)
   1. Amputation
   2. Transplantation (medicine)
   3. Plastic surgery
3. Medical diagnosis
4. Medical test
5. Palliative care
6. Physical examination
   1. Autopsy
   2. Biopsy
   3. Blood pressure
   4. Blood test
   5. Blood transfusion
   6. Eye examination
   7. Lumbar puncture
   8. Pap test
   9. Pulse
   10. Reflex
7. Sterilization
8. Therapy
   1. Chemotherapy
   2. Physical therapy
   3. Radiation therapy
   4. Symptomatic treatment

Morbidity

This section contains 140 articles.

Non-infectious disease

This section contains 24 articles.

1. Disease (Level 2)
2. Acne
3. Allergy (Level 3)
4. Alzheimer's disease
5. Anemia
6. Arthritis (Level 3)
7. Asthma (Level 3)
8. Autoimmune disease
9. Bronchitis
10. Cardiovascular disease (Level 3)
    1. Hypertension
    2. Myocardial infarction (Level 3)
11. Chronic obstructive pulmonary disease
12. Cirrhosis
13. Dementia (Level 3)
14. Diabetes (Level 3)
15. Diarrhea
16. Epilepsy
17. Gout
18. Hepatitis
19. Meningitis
20. Migraine
21. Multiple sclerosis
22. Parkinson's disease

Injury

This section contains 19 articles.

1. Injury (Level 3)
   1. Blunt trauma
   2. Bone fracture
   3. Bruise
   4. Burn
   5. Frostbite
   6. Wound
2. Major trauma
   1. Aneurysm
   2. Brain injury
      1. Concussion
   3. Bleeding
   4. Cardiac arrest
   5. Hypothermia
   6. Hypoxia
   7. Inflammation
   8. Respiratory failure
   9. Shock
   10. Stroke (Level 3)

Infectious disease

This section contains 54 articles.

1. Infection (Level 3)
2. Pathogen
   1. Virus (Level 3)
      1. Coronavirus
      2. Human papillomavirus infection
      3. HIV
      4. Tobacco mosaic virus
   2. Prion
3. Anthrax
4. Botulism
5. Bubonic plague
6. Chickenpox
7. Cholera
8. Common cold (Level 3)
9. COVID-19
10. Dengue fever
11. Diphtheria
12. Ebola
13. Encephalitis
14. Epidemic
    1. Pandemic
15. Foodborne illness
16. Fungal infection
17. Gangrene
18. Gastroenteritis (Level 3)
    1. Dysentery
19. Hand, foot, and mouth disease
20. Influenza (Level 3)
21. Leprosy
22. Lyme disease
23. Malaria (Level 3)
24. Measles
25. Mumps
26. Pneumonia (Level 3)
27. Polio
28. Rabies
29. Rotavirus
30. Rubella
31. Scabies
32. Scarlet fever
33. Sexually transmitted infection (Level 3)
    1. Chlamydia
    2. Gonorrhea
    3. Herpes
    4. HIV/AIDS (Level 3)
    5. Syphilis
34. Smallpox (Level 3)
35. Tetanus
36. Tuberculosis (Level 3)
37. Typhoid fever
38. Typhus
39. West Nile fever
40. Whooping cough
41. Yellow fever

Disability

This section contains 8 articles.

1. Visual impairment
2. Cerebral palsy
3. Color blindness
4. Down syndrome
5. Dyslexia
6. Hearing loss
7. Intellectual disability (Level 3)
8. Physical disability (Level 3)

Cancer

This section contains 12 articles.

1. Cancer (Level 3)
2. Brain tumor
3. Carcinogen
4. Breast cancer
5. Colorectal cancer
6. Leukemia
7. Lung cancer
8. Lymphoma
9. Neoplasm
10. Prostate cancer
11. Skin cancer
    1. Melanoma

Mental disorder

This section contains 14 articles.

1. Mental disorder (Level 3)
2. Anxiety disorder
   1. Phobia
   2. Post-traumatic stress disorder
3. Attention deficit hyperactivity disorder
4. Autism (Level 3)
5. Bipolar disorder
6. Eating disorder
7. Major depressive disorder
8. Neurosis
9. Pedophilia
10. Personality disorder
    1. Psychopathy
11. Schizophrenia

Miscellaneous

This section contains 9 articles.

1. Coma
   1. Vegetative state
2. Poison
   1. Toxicity
   2. Mushroom poisoning
3. Psychosis
   1. Delusion
   2. Hallucination
4. Syndrome