Question

Explain the mechanism of breathing in human beings.

Answer 1

When you breathe , your chest goes up( expands) and goes down (compresses).During inhalation,ribs move outwards and upwards and the diaphragm moves down,increasing the space in the chest cavity. This movement increase the space in the chest cavity due to which air rushes into the lungs and the lungs inflate. During exhalation, the ribs move downward and inwards and the diaphragm moves up, reducing the size of the chest cavity, thereby pushing air out of the lungs.

Answer 2

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• The breathing in human beings takes place through the organs called lungs. The taking in of air rich in oxygen into the body during breathing is called 'inhalation' and giving out (or expelling) the air rich in carbon dioxide is called 'exhalation'. Both, inhalation and exhalation take place regularly during breathing ...