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.?

well we can't tell you because we cant see the time give a screen shot or something.

what is this saying?

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.