White blood cells are cells found in blood that "fight" pathogens when they enter your body (when they manage to go trough your skin).
Answer: D. none of the above.
Hope it helped,
Happy homework/ study/ exam!
B. The PNS is the voluntary response to stimuli. You get to choose what you want to do with the stimuli
i beleive that is the respiratory system but ill double check in a m inute
alright heres all your answers for that test question 1 true
question 2 oxygen question 3 carbon dioxide question 4 true question 5 alvoei question 6 diaphram question 7 respitory system the last 3 are all true i hope i helped
