1 Answer

Xaphod · Answer 1 · 2021-03-02T05:28:23+0000

Answer:

They give the lungs a really big surface area. They have moist, thin walls, which are only one cell thick. They have a lot of tiny blood vessels called capillaries.

Step-by-step explanation:

0 Comments

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

0 Comments

Please log in or register to add a comment.

Other Questions