QUESTION 15
Vital respiratory capacity is reduced by half between ages 25 and 80 because

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 part of the female reproductive system produces sex hormones and contains eggs? the uterus the ovaries the vagina the fallopian tubes

Which u.s. state is home to the fewest species of mosquitoes?