Question

how is alveoli designed to exchange gases

Answer 1

Answer: alveoli is made up of 3layers

Diffusing boundary of alveoli is made of simple squamous epithelium which help in gaseous exchange acc.

to partial pressure of gas

Explanation:

Answer 2

♥ The alveoli are thin walled and richly supplied with a network of blood vessels to facilitate exchange of gases between blood and the air filled in alveoli .

♥ Alveoli have balloon-like structure . Thus , provide maximum surface for exchange of gases .