are chemicals that kill bacteria or slow their growth without harming the human body.

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.

Why should you to explore different careers at this point in your life

Which of these contraceptive methods would be most beneficial for a female who wishes to avoid side effects or surgery?