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प्रश्न
Answer the following in detail.
Show the mechanism of breathing in human beings.
उत्तर
The process of taking in oxygen and giving out carbon dioxide is called breathing. It is a physical process and carried out by the movement of the various body parts.
- Inhalation: When we inhale air our ribs move upwards and outwards and the diaphragm moves downwards. The volume of the chest cavity increases and the air pressure is reduced, as a result of which air flows into the lungs.
- Exhalation: When we exhale air, that is breathed out air, the diaphragm moves upwards and the ribs move downwards and inwards. The space inside the chest cavity decreases and the air pressure is increased as a result the air rushes out.
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