Question

What is the role of alveoli in lungs and sweet glands in skin in excretion?

Answer 1

Alveoli:

* the air sac that is surrounded with capillaries for gas exchange

* is the functional unit for gas exchange

Sweat Glands (Skin)

* water (98%), salts, and a small amount of urea diffuse from the blood into sweat glands

* excreted through the process of perspiration (sweating)

* main job of sweating is to maintain body temperature (cool down)