What is a living cell

Mucous membranes.. a. cover or line external surface of body. b. line internal body surfaces that are in contact with the environment. c. produce antibodies to combat infection. d. secrete sweat, which has antibacterial enzymes.

Dark clothing enables sweat to be evaporated on the skin's surface very quickly. loose light tight

Which aspect of a workout includes preparing the muscles for vigorous activity? cooling down preparing a schedule warming up determining target heart rate