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Andreas93 [3]
2 years ago
5

Do intercostal muscles contract or relax when we breathe.

Health
2 answers:
Triss [41]2 years ago
6 0

Breathing in

the internal intercostal muscles relax and the external intercostal muscles contract, pulling the ribcage upwards and outwards. the diaphragm contracts, pulling downwards. lung volume increases and the air pressure inside decreases.

<h2>HOPE IT HELPS!</h2>

#BrainlyFast

#MakeThisBrainliestAnswer

maks197457 [2]2 years ago
6 0

Answer:

the internal intercostal muscles relax and the external intercostal muscles contract, pulling the ribcage upwards and outwards. the diaphragm contracts, pulling downwards. lung volume increases and the air pressure inside decreases.

Explanation:

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