My Bio book Among vertebrates, amphibians have relatively small lungs that do not provide a large surface, and rely heavily on diffusion across other body surfaces for gas exchange[respiration]....Turtles are a exception; they supplement lung breathing with gas exchange across moist epithelial surfaces in their mouth and anus.
Yep this was discovered by scientist who discovered that the butt hole stayed open all the time in one species of turble and they wondered why...so they held the small turtles to a flashlight and the light shined through the shell and they discovered an internal sac/organ that can process oxygen...
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Among vertebrates, amphibians have relatively small lungs that do not provide a large surface, and rely heavily on diffusion across other body surfaces for gas exchange[respiration]....Turtles are a exception; they supplement lung breathing with gas exchange across moist epithelial surfaces in their mouth and anus.
:)
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0_o weird ass scientist
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