The ____ represent an internal respiratory system.
A) skin folds on an amphibian
B) broad, flat body of a flatworm
C) branched gill filaments
D) folds within human lungs
E) gills on a salamander
Correct Answer:
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Q14: Diffusion of respiratory gases is enhanced by
Q15: The process of _ is the exchange
Q16: Countercurrent exchange allows for the removal of
Q17: Planes maintain an atmospheric pressure equivalent to
Q18: The _ are air-filled respiratory system structures
Q20: Air is the least optimal respiratory medium
Q21: Air becomes deoxygenated during the _ of
Q22: The _ is/are responsible for closing off
Q23: A _ uses air sacs to ventilate
Q24: The respiratory surfaces of mammalian lungs are
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