To allow rapid diffusion between the body and the environment, gas exchange requires a surface that is both ________.
A)durable and stiff
B)protected within the body and connected to the circulatory system
C)thin and moist
D)permeable to oxygen and impermeable to carbon dioxide

Question

Quizplus · Accepted Answer

Gas exchange surfaces need to be thin to minimize the distance over which gases must diffuse, and moist to allow gases to dissolve and diffuse across the surface efficiently.

To Allow Rapid Diffusion Between the Body and the Environment