Amphibians:a

may exchange gases across their body surfaces.
b. all have fairly simple, book lungs.
c. all have gills and swim bladders, homologous to those found in fishes.
d. are characterized by having parabronchi across which most of the gas exchange occurs.
e. have a large oxygen demand that is met by using a countercurrent gas exchange
mechanism


A

Biology & Microbiology

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