Respuesta :

ravendavis5

Answer:

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.

Explanation:

Johnhhhb

Answer:

A diaphragm is a large dome-shaped muscle under the lungs that squeezes downward when you breathe in, making a vacuum that causes a rush of fresh air into your lungs. i hope this helps!