Gases enter and leave a mammal's body by diffusing across a ____.
A)membrane made up of multiple cell layers
B)hard exoskeleton
C)thin, moist membrane
D)set of gills
E)protective layer of thick cells

Question

Quizplus · Accepted Answer

Gases like oxygen and carbon dioxide are small enough to diffuse across a thin, moist membrane, such as the respiratory surface in the lungs or the skin in some amphibians. Therefore, option C, a thin, moist membrane, is the best choice for how gases enter and leave a mammal's body.

Gases Enter and Leave a Mammal's Body by Diffusing Across