The valve between the right atrium and the right ventricle
is called the tricuspid valve. This valve opens to allow blood to be pumped from the
right atrium in to the right ventricle. Once the blood has passed through the valve
closes so the blood cannot pass back. The name tricuspid comes from the fact that it has
three flaps.
The valve between the left atrium and left
ventricle is called the bicuspid valve. It also allows the flow of blood in one
direction. After the oxygenated blood flows from the atrium to the ventricle the valve
closes to prevent the blood from flowing back. This valve has only 2 flaps which give it
the name bicuspid.
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