The stage of the heart cycle in which the heart muscle is relaxed<span>, allowing the chambers to fill with blood. ... The </span>stage of the heart cycle in which the heart muscle<span> contracts and the chambers pump blood. Systolic Pressure. Blood pressure in the arteries during contraction of the ventricles</span>
Answer: Haiya! Explanation: I am sorry if this is wrong forgive me if it is wrong. I am not going to lie cause I ain’t a liar but I looked at the person above me for the answer..... I am sorry!
It’s has cell wall to keep it safe
