Breathing is accomplished via the rhythmic contraction and relaxation of
A) smooth muscle.
B) skeletal muscle.
C) cardiac muscle.
D) smooth muscle and cardiac muscle.
E) smooth muscle and skeletal muscle.

Question

Quizplus · Accepted Answer

Breathing is accomplished by the contraction and relaxation of the diaphragm and other skeletal muscles involved in respiration.

Breathing Is Accomplished Via the Rhythmic Contraction and Relaxation of