Answer:
Alveoli are small pouches
or sacs like structure. They are surrounded by blood capillaries. Thus a large
amount of air is brought in contact with the air in the lungs. More than
millions of alveoli are present in the lungs. The presence of millions of
alveoli in the lungs provides a very large surface area for the exchange of
gases. The availability of large surface area maximizes the exchange of gases.
You need to login to perform this action.
You will be redirected in
3 sec
