Question

Why the muscles around the rib cage contracts when we inspire.​

Answer 1

THE ANSWER IS:-

During inspiration, the diaphragm and external intercostal muscles contract, causing the rib cage to expand and move outward, and expanding the thoracic cavity and lung volume. This creates a lower pressure within the lung than that of the atmosphere, causing air to be drawn into the lungs.

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Answer 2

Answer:

the primary muscles of inspiration are the diaphragm ,the upper and more lateral external intercoastals ,and the parasternal portion of the internal intercoastal muscles.both the external intercoastal muscles and the para sternal portion of the internal intercoastal muscles elevate the ribs