Question

Describe the changes that take place 1 around the rib cage 2 diaphragm 3 chest cavity , during inspiration . state the effect of these changes

Answer 1

Answer:

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

Hey!

1 . Around the rib cage during inspiration the inter coastal muscles contract

2.the diaphragm contract( moves down) and lungs move down as well as outward

Due to these changes the pressure in lungs decreases because volume increases and we know that Air moves from a region of higher pressure to a region of lower pressure so air moves inside the lungs

3.The chest cavity moves outwards due to intercostal muscles and diaphragm contraction.

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