Question

D) Muscular floor of chest cavity is called​

Answer 1

Explanation:

The diaphragm, located below the lungs, is the major muscle of respiration. It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges.

Answer 2

Answer:

Thé diaphragme located below the lung is the major musclé of respireration. It is large demo -

shaped muscle