Gas Exchange in Other Animals (OCR A-Level Biology A): Flashcards
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4 common features of all gas exchange systems
4 common features of all gas exchange systems
Large SA, moist, short diffusion path, good blood supply
Teleosts
Teleosts
Bony fish with skeletons made of bone
Function of gill lamellae
Function of gill lamellae
Increase surface area for gas exchange on gill filaments
Operculum
Operculum
Protective flap covering gills in bony fish
Counter-current flow O2 extraction rate
Counter-current flow O2 extraction rate
80-90% of oxygen from water
Concurrent flow O2 extraction rate
Concurrent flow O2 extraction rate
50% or less of oxygen
Spiracles in insects
Spiracles in insects
Openings along abdomen for air entry
Tracheae in insects
Tracheae in insects
Main air tubes running through body
Tracheoles
Tracheoles
Smaller tubes branching from tracheae to reach cells
Chitin rings in tracheae
Chitin rings in tracheae
Prevent tubes from collapsing under pressure