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mechanisms of breathing

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mechanisms of breathing

Posted by Pushpraj Singh 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Shreya ... 6 years, 3 months ago

When we breathe in, the muscles b/w the ribs contract causing the rib cage to move upward and outward and the diaphragm contracts and moves downward and movement of diaphragm both increase the space in the chest cavity and make it larger. As the chest cavity becomes larger, air is sucked in from outside into the lungs and lungs get filled up with air and expand. When we breathe out the muscles b/w the ribs relax causing rib cage to move downward and inward and the diaphragm relaxes and move upward. This movement of rib cage, and upward movement of diaphragm both deacreases the space in our chest cavity and make it smaller, pushing air out from the lungs.

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Posted by Pandey Ji 9 months ago

CBSE > Class 10 > Science

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Posted by Ansh Preet 2 months, 2 weeks ago

CBSE > Class 10 > Science