Biology, asked by yogitamhaskar7, 11 months ago

Define breathing. Explain the mechanism of breathing in human beings?

Answers

Answered by amitmohit854
1

Answer:

he process of taking air into and expelling it from the lungs is called breathing. The action ofbreathing in and out is due to changes of pressure within the thorax, in comparison with the outside. ... When we inhale the intercostal muscles (between the ribs) and diaphragm contract to expand the chest cavity.

Explanation:

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Answered by sandipan132006
0

Answer:

the process of inhaling oxygen and exhaling carbon dioxide is called breathing

the nose inhales air with high percentage of oxygen there are fine hair present inside the nose which blocked the dust particles the air then passes through the inner mucus during this course air becomes warm

then through the wind pipe it enters the lungs.then through the bronchi and bronchioles it enters into the alveoli Nd diffuses into thin blood capillaries.

then the carbon dioxide diffuses into the alveoli and mixes with the air.the it goes all the steps backs and is exhaled through the nose

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