Skin has pores that help the body sense odor. Skin protects the body from harmful substances. Skin brings oxygen directly into the body's bloodstream.
I gave my students this multiple choice question: What is the function of skin on the human body?

Only one answer is correct among these 4 choices:
- Skin has pores that help the body sense odor.
- Skin protects the body from harmful substances.
- Skin brings oxygen directly into the body's bloodstream.

Could you tell me which one is correct?

Skin protects the body from harmful substances.