Question

give reason for the lungs alveoli are covered with blood capillary

Answer 1

This is because the air inhaled diffuses with the walls of alveoli and help in the exchange of gases. The walls of alveoli are extremely thin allowing easy diffusion of gases.

Answer 2

To allow oxygen to diffuse into the blood capillaries.

Explanation:

Alveoli present in the lungs are capable of exchanging gases. It is the main functional unit which sends the oxygen into the blood capillaries.

The carbon dioxide from the organs are sent back for coming out of the body and the oxygen is diffused into the blood capillaries so that it is send to various organs.

This is the reason the alveoli of the lungs are covered with blood capillaries.

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