Tidal ventilation is feasible in large, air-breathing animals because A) O₂ is more available in air than water. B) O₂ is more available in water than air. C) it enables countercurrent gas exchange. D) it increases the partial pressure of O₂ in the lungs. E) it increases the partial pressure of O₂ in the lung.

Question

Quizplus · Accepted Answer

Air contains a higher concentration of O₂ compared to water, making tidal ventilation effective for large, air-breathing animals.

Tidal Ventilation Is Feasible in Large, Air-Breathing Animals Because