Living a sedentary lifestyle is a health risk.

The skin includes multiples layers. which of the following is not one of the layers of the skin?

Catalina ate a candy bar and then went on a fast-moving ride in an amusement park. she was sick to her stomach after the ride and now, catalina cannot eat candy bars, because they make her nauseous. in this learned association, the candy bar serves as a(n) to catalina.

True or false. mucous membranes secrete mucus that traps pathogens.