Bird and fish respiratory systems are similar in that both

Question

Quizplus · Accepted Answer

Both bird and fish respiratory systems rely on unidirectional flow of the environmental medium (air or water) over the gas exchange membranes in order to maximize gas exchange efficiency.

Answer: A and B
 Both bird and fish respiratory systems have air sacs and employ a countercurrent exchanger. Air sacs are important for efficient respiration in birds, while countercurrent exchange helps fish extract the maximum amount of oxygen from water.

Bird and Fish Respiratory Systems Are Similar in That Both