2. why are capillaries and not arteries or veins found in alveoli, nephrons, and villi?
vessels must be small so that very little blood enters these tissues.
vessels must be narrow so that only very small molecules can reach these tissues.
vessel walls must be thin to allow ease of transfer of molecules to these tissues.
vessels must be lightweight so that they do not interfere with the movements of these tissues.

Does masterbation affect height growth or loss of growth hormone?

High blood pressure occurs when there is too much blood flowing through the blood vessels at one time. by changing the amount of water in the blood, blood pressure can change. the excretory system can to lower blood pressure. which would most likely occur in the kidney? a)more water would be transferred from the nephron. b)less water would be absorbed into the nephron. c)the amount of water in the bladder would decrease. d)the amount of water in the blood would increase.

How does photosynthesis cellular respiration happen in a plant