semi lunar valves
In the cardiac cycle, blood flowing into the heart is called the systole.
The valves that prevent blood from flowing back into the atria are called atrioventricular valves.
There are valves in the heart - and the larger blood vessels that stop the blood flowing backwards.
The valve
All the blood flowing through the intestines passes through the liver on its way back to the heart.
The mitral valve prevents blood from flowing back from the left ventricle to the left atrium in the heart.
semilunar
the valves
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The heart has valves for to allow blood flow in one direction only. They close as the blood passes each. Hooweestik.
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