The primary advantage of gills versus the body surface for gas exchange in aquatic animals is that ________.
A)gills are located near the mouth
B)all gills contain a countercurrent exchange system
C)gills have a much greater diffusion surface area
D)gills decrease resistance to movement

Question

Quizplus · Accepted Answer

Gills have a much greater diffusion surface area than the body surface, allowing for more efficient gas exchange. This is because gills are composed of many thin, flattened filaments or plates with many small projections called lamellae, which greatly increase surface area.

The Primary Advantage of Gills Versus the Body Surface for Gas