Question

What part do the inter costal muscles play in the
inspiration and expiration of a mammal?​

Answer 1

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.....

In addition, the external intercostal muscles participate in inspiration by pulling the ribs abaxially to increase the width of the thoracic cavity. The net effect is an increase in the size of the thoracic cavity, producing subatmospheric intrathoracic pressure, to drive inspiration and pulmonary inflation.....

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Answer 2

Answer:

To move ribs and diaphragm.