Which of the following statements about fish gills is true?
A) They have a large surface area.
B) Because of their efficiency, they only need a small surface area.
C) They have a poor blood supply.
D) Like lungs, they have an exhale/inhale function.

Question

Quizplus · Accepted Answer

Fish gills have a large surface area to facilitate gas exchange between water and their blood. This enables them to extract the amount of oxygen they require from water, which contains less oxygen than air.

Which of the Following Statements About Fish Gills Is True