Breathing out occurs when the respiratory muscles _____. relax dilate contract

Biology

2 answers:

damaskus [11]2 years ago

6 0

Answer:Relax

Explanation:

In exhalation, the diaphragm moves upward and the chest wall muscles relax, causing the chest cavity to get smaller and push air out of respiratory system through the nose or mouth. Every few seconds, with each inhalation, air fills a large portion of the millions of alveoli.

Studentka2010 [4]2 years ago

3 0

Breathing out occurs when the respiratory muscles relax

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