Question

04. List three features of alveoli which enable them to perform their functions​

Answer 1

Answer:

carbon dioxide diffuses from the blood into the air in the alveoli.

...

Here are some features of the alveoli that allow this:

they give the lungs a really big surface area.

they have moist, thin walls (just one cell thick)

they have a lot of tiny blood vessels called capillaries.

Answer 2

Explanation:

it is a main site of human respiratory system where diffusion of gases O2 and CO2 occurs .

bronchioles open into the alveolar ducts that is a tube like structure which lead into expanded passages the Atria that opens into alveolar sacs or air sacs. there are about 300 million into lungs the membrane of aveoli very thin, irregular simple squamous and richly supplied with blood vessels due to very close contact of blood vessels with alveoli ,the exchange of gases takes place easily .

surfactant: a surface active agent- lecithin secreted by type II alveolar epithelial cells, reduces surface tension between the Alveolar fluid and air. it prevents collapsing of lungs

i.thin squamous epithelium of alveoli that lines it.

ii. Endothelial lining of alveolar capillaries that surround it.

iii. Basement membrane : In between thin squamous epithelium of alveoli and endothelium of alveolar capillaries , basement substance is present.

I HOPE THIS MAY HELP YOU .

MARK AS BRAINLIEST