Which of the following is true about blood pressure?
a. it is not affected by atherosclerosis.
b. it falls when the heart contracts.
c. diastolic pressure is higher than systolic pressure.
d. artery walls to maintain pressure, even between heart beats.?

i tried the eyeshadow trick you told me about and it worked so good i i did a yellow going into orange colors and it was bright and you could see it on my eyes

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explanation:

bc blah

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.