Biology, asked by shwkatnagur7990, 10 months ago

5.
muscles contract when the
external intercostal muscles contract
a. Internal abdominal
b. Jaw
c. Muscles in bronchial walls
d. Diaphragm

Answers

Answered by Anonymous

Answer:

The muscles of respiration are those muscles that contribute to inhalation and exhalation, by aiding in the expansion and contraction of the thoracic cavity. The diaphragm and, to a lesser extent, the intercostal muscles drive respiration during quiet breathing...

When you exhale: the external intercostal muscles relax and the internal intercostal muscles contract, pulling the ribcage downwards and inwards. the diaphragm relaxes, moving back upwards. lung volume decreases and the air pressure inside increases.

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