Question

what is breathing . explain that question​

Answer 1

Answer:

The process of exchange of oxygen from the atmosphere with carbon dioxide produced by the cells is called breathing.

or

A physical process by which oxygen is taken in and carbon dioxide is given out is called breathing.

Steps of breathing:

1)Ribs get moved up when we breathe in and flatter-r the diaphragm due to which the chest cavity becomes larger. Hence, the air is sucked into the lungs and fills the expanded alveoli.

2)Haemoglobin binds with the oxygen and carries it along the blood in the body. Oxygen from the blood diffuses into the cell as the blood moves through the tissues.

3)Carbon dioxide which is produced during respiration diffuses into the blood and is carried to the lungs for expiration.

4) Ribs move down and diaphragm becomes dome-shaped decreasing the chest cavity. Thus, pushing the air out from lungs.

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