What Causes Blood To Circulate?


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Meg Hayes Profile
Meg Hayes answered
The blood flow around the body is controlled by the circulatory system, which is very closely linked to the heart. It is called the circulatory system because the blood "circles" the body, moving through the heart and all your blood vessels.

· Circulatory system.

The circulatory system is made up of several factors. The pulmonary circulation, which is the "circle" the moves through the lungs as the blood will release waste and then become oxygenated. And the systemic circulation, which is where the newly oxygenated blood will transported through the rest of the body. This is done though blood vessels. The heart is that the center of this system, keeping it up and running

· Pulmonary Circulation.

Blood that has not been oxygenated will enter the right part of the heart. It does this by entering through the vena cava and into the right atrium and it will then be pumped into the right ventricle.

Once it is in the right ventricle, the un-oxygenated blood will be pumped into the pulmonary arteries, which is where the blood will become oxygenated. This blood will then leave the lungs through the pulmonary veins.

It will then enter the left atrium of the heart and will then be pumped through the bicuspid valve and into the left ventricle, which means that it is ready to be transported to the rest of the body.

· Systemic circulation.

Blood that contains oxygen is pumped through the aortic semi-lunar valve and out of the left ventricle. It will then enter the aorta which splits off into major arteries which can lead all over the upper body. The blood will enter smaller vessels and continue to do so e.g. From arteries into arterioles and then into capillaries, which is where the oxygen will be lost.

Once the oxygen has been lost, the blood will be collected by venules. The veins link back to the right side of the heart, and the process will begin again from pulmonary circulation and then on to systemic circulation and continue to repeat itself.
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Anonymous answered

what causes blood to circulate

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