Respiration
A) is only necessary for mammals.
B) in most animals involves both the circulatory and respiratory systems.
C) must occur over a dry surface.
D) is an anaerobic process.
E) is only necessary for mammals, and must occur over a dry surface.

Question

Quizplus · Accepted Answer

Respiration in most animals involves both the circulatory and respiratory systems. The respiratory system helps in the intake of oxygen and the elimination of carbon dioxide, and the circulatory system helps in the transport of respiratory gases to and from the body's tissues.