Question

what is the function of intercostal muscles????

Answer 1

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In humans, the intercostal muscles play a large part in breathing. During inhalation, the diaphragm is relaxed, allowing the lungs to expand.
The innermost intercostal muscles relax, while the external intercostal muscles contract, causing the chest cavity to expand.
This expansion allows the lungs to fill with air, due to the negative pressure created by the extra space. Air fills the lungs, gases are exchanged, and it is time to exhale.

To force the air out, the space must become smaller, to put pressure on the air. To do this, the opposite process of inhalation happens. The diaphragm contracts, applying force from the bottom of the lungs.
The innermost intercostal muscles now contract, while the external intercostal muscles relax. This causes the chest cavity to contract as a whole, forcing the air out of your lungs. The internal intercostal muscles, or middle layer of muscle, helps keep the ribs from separating and holds the shape of the chest cavity.

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Answer 2

Evening ,,

## answer is given below

Role of intercostal Muscles=>>

there are several group of muscles , that run between the ribs, and help form and move the chest wall.

intercostal muscles are mainly involved in the mechanical aspect of breathing.