Question

Explain the mechanism of breathing in human beings

Answer 1

Mechanics of Breathing. The action of breathing in and out is due to changes of pressure within the thorax, in comparison with the outside. This action is also known as external respiration. When we inhale the intercostal muscles (between the ribs) and diaphragm contract to expand the chest cavity.




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Answer 2

Hey mate, here is your answer ☺️☺️
Breathing means exchange of gases.
In humans, gases exchanged with the help of bronchi. O2 enters in our body and we utilize it n then release CO2 after the oxidation of O2.
Hope it helps u dear ✌️✌️