Perspiration rids the body of excess water. Perspiration eliminates bacteria from the skin. Perspiration opens skin pores to absorb more oxygen. Perspiration helps to maintain a stable body temperature.
I gave my students this multiple choice question: Which statement best describes the primary role of perspiration in humans?

Only one answer is correct among these 4 choices:
- Perspiration rids the body of excess water.
- Perspiration eliminates bacteria from the skin.
- Perspiration opens skin pores to absorb more oxygen.
- Perspiration helps to maintain a stable body temperature.

Could you tell me which one is correct?

Perspiration helps to maintain a stable body temperature.