Biology, asked by shruti2213, 11 months ago

describe the mechanism of breathing in human beings

Answers

Answered by gowtham73

When we inhale the intercostal muscles (between the ribs) and diaphragm contract to expand the chest cavity. The diaphragm flattens and moves downwards and the intercostal muscles move the rib cage upwards and out. This increase in size decreases the internal air pressure and so air from the outside (at a now higher pressure than inside the thorax) rushes into the lungs to equalise the pressures.

When we exhale the diaphragm and intercostal muscles relax and return to their resting positions. This reduces the size of the thoracic cavity, thereby increasing the pressure and forcing air out of the lungs.

shruti2213: can u make it simple

gowtham73: Hey shruti sis

gowtham73: this is the simplest answer

gowtham73: Breathing is simply defined as the physical process in which oxygen is taken into the body and carbon dioxide is forced out from the body.
Breathing is brought about by two sets of muscles-
i. Internal intercoastal muscles
ii. External intercoastal muscles
Besides these muscles, diaphragm and abdominal muscles help in breathing.

gowtham73: Please mark me brainliest

shruti2213: thank you so much

gowtham73: Even thanks a lot for marking me the brainliest

shruti2213: welcome

Answered by DivineEyes

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The breathing in human beings takes place through the organs called lungs. The taking in of air rich in oxygen into the body during breathing is called 'inhalation' and giving out (or expelling) the air rich in carbon dioxide is called 'exhalation'. Both, inhalation and exhalation take place regularly during breathing.

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