Question

in what part of the cardiac cycle the heart receives it's blood flow

Answer 1

Hmm - do you mean when the heart tissue itself receives oxygenated blood? Like - through the coronary arteries?

Answer 2

yep

Answer 3

Apologies for the late reply. I would say then, the answer would be "Ventricular ejection", going by the chart Wikipedia provides here: http://en.wikipedia.org/wiki/Cardiac_cycle

This is the stage when the ventricles contract and blood is pumped out of the aorta (and pulmonary arteries). Since the coronary arteries branch right off the aorta, it would be right during this stage that the heart would receive its supply of blood.

Answer 4

what about the right ventricle?

Answer 5

kma230 gives a very good answer. The right ventricle pumps out into the pulmonary arteries. I hope that's enough of a clue.

Answer 6

actually i know the answer...
here's the thing, flow, ANY FLOW be it air fluids, wahtever is from a high pressure to a lower pressure.
areterioles and cpillaries that "feed" a tissue have a pressure of ~25-30 mmhg. in the left ventricle, during systole - the heart contracts to well over 100 mmhg - think about the blood pressure goal of 120/80. therefore- the left ventricle is "fed" only during diastole. stated otherwise - ventricular ejection the heart "squeezes" itself out of blood. during diastole, with let say 80 mmhg diastolic pressure 80>30 - prefusion - bingo.
in the right ventricle things are way different. the maximal normal pressure of right ventricular contraction does not exceed ~20mmhg. therefore evenduring systole 120>~20 (right ventricular pressure) and you get perfusion

there's lots of basic physics in phsyiology. presonally - i love it