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protein fibres that can deform and then recoil to their original size

tidal volume

Which is NOT a precaution you should take before using a spirometer

slender branches of tissue that make up the gill

lamellae

the large surface area in a fish's exchange surface comes from.....

insects have an _____ circulatory system

gaseous exchange in insects takes place between...

the tracheal fluid is withdrawn when insects need ____ air

the need for a transport DOES NOT depend on...