Respiratory Systems Among Various Animal Groups

Taxon

Medium

Type

Absorption surface

Humans

Air

Pump lung

Complex alveoli

Birds

Air

Pump lung with added air sac

Simple alveoli in lung, and internal surface of air sacs

Lizards

Air

Pump lung

Simple alveoli

Crocodiles

Air

Pump lung

Simple alveoli

Saurischian dinosaurs

Air

Pump lung with added air sac

?

Fish

Water

Counter current gills

Gill surface

Bivalve mollusks

Water

Medium pressure

Pump gills

Chambered cephalopods

Water

Complex gills, high pressure pump gills

Gill surface

Brachiopods

Water

Low pressure pump gills

Lophophore surface, punctae (terebratulids)

Scleractinian corals

Water

No gill epithelial adsorption

Epithelium, internal mesentaries

Echinoids

Water

External gill, adsorption, tube feet

Gill surface

Bryozoans

Water

Lophophore

Epithelial absorption

Sponges

Water

No gills, medium pressure pump

Choanocyte cell surface

Tunicates

Water

Internal gill, medium pressure pump

Internal gill surface



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