Question

which of these allows exahange of gases____________​

Answer 1

$\huge\bold{Answer:-}$

Lung alveoli or blood capillaries.

$\huge\bold\purple{☆}$ Alveoli $\huge\bold\purple{☆}$

Alveoli allows exchange of gases in lungs. They are present in the lungs to help in the fast exchange of oxygen and carbon dioxide.

Alveoli absorbs the oxygen which moves in during breathing in and releases out carbon dioxide when we breathe out. Alveoli plays a major role in the fast exchange of oxygen and carbon dioxide. They are thin - walled , which helps gases to diffuse in. Many alveoli are present inside the lungs and they increase their area when gas diffuses in.

$\huge\bold\purple{☆}$ Blood capillaries $\huge\bold\purple{☆}$

The tiniest blood vessels, capillaries, plays an important role in exchange of gases. They also help in removing waste and delivers nutrients.

Answer 2

Answer:

Alveoli allows exchange of gases.