Question

how does the gas exchange work in the body?

Answer 1

The process of gaseous exchange inside the human body is referred as the involvement of two major steps first the inspiration and then expiration.

Inspiration is the process of breathing in. In this the diaphragm moves downward leading to the expansion of the lung. The expanded lungs fill the air and the air pressure in the alveoli decreases than the atmospheric pressure. This enables the incoming of the air more easily inside. Then the hemoglobin makes the complex with O2 to form oxyheamoglobin, which releases the oxygen into the blood.

In the second step the expiration is the process of breathing out. In this the diaphragm relaxes and moves back upside, this leads to the contraction of the lungs, leading to development of the more air pressure in the alveoli than the atmospheric pressure which causes the expulsion of the air out of the lungs.

In this process the hemoglobin makes the complex to CO2 as carboxy-hemoglobin, which releases CO2.

Thus by combination of both steps the gas exchange work in the body.