Question

Write the mechanisms for respiration in mammals.

Class-VI / 6​

Answer 1

Answer:

The process of respiration involves the breathing-in of the oxygen-rich air from outside (inspiration) and breathing-out of the air loaded with carbon dioxide (expiration). 

During inspiration, the diaphragm moves down and the ribs move upwards and outwards, thereby increasing the space in the chest cavity. This leads to the movement of air inside the lungs.

During exhalation, the diaphragm moves to its former position and the ribs move downwards and inwards, thereby reducing the size of the chest cavity. This leads to the movement of air out of the lungs.

Answer 2

Explanation:

Mammalian respiratory systems rely on a single large muscle at the base of the lungs. This muscle is called a diaphragm. The diaphragm pulls the lungs downward to increase their volume, causing air to rush into the lungs. As it presses upward, the lungs become smaller, and air is exhaled

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