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pradeep negi
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Posted 4 year ago
pradeep negi 
Explain the process by which inhalation occurs during breathing in human beings?
1 Answer(s)
Mitesh Sharma
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Posted 4 year ago Mitesh Sharma

It occurs when the diaphragm moves up and the chest cavity becomes narrower. This creates a pressure on the air inside the lungs. As a result the air comes out of the lungs to the atmosphere due to lack of space inside. During this process, the chest wall expands out and away from the lungs.