Free points for chenxie (and someone else)

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.

Which is a personal reason for using tobacco

Describe the difference between a normal stress response and those that many indicate a need for additional support from a health professional.