How does the structure of the alveoli allow for its function of gas exchange?
a. alveolar sacs produce mucus that makes gas exchange easier.
b. alveolar sacs rely on valves to ensure that air flows only in one direction.
c. alveolar sacs are located within muscles that contract, which increases gas exchange.
d. alveolar sacs are surrounded by thin capillaries where gases can be exchanged.

The correct answer would be D.Alveolar sacs are surrounded by thin capillaries where gases can be exchanged.

Alveoli are tiny sacs which form the site of gas exchange in the lungs.

The features of alveoli which help in gas exchange are:

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

i think the answer is g1

hope i

-lavira: )