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A circulatory system is a system of blood vessels that transports blood to every part of the body.

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The blood enters the heart through the large vein. ( you can see in the picture above.)

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The left is where the left atrium and left ventricle. is located. The left atrium collects blood coming back from the lungs. The left ventricle pumps blood to rest the blood.

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The right of your heart is the right atrium and right ventricle.. The right atrium collects blood coming back from the body and the left ventricle pumps blood to the lungs in order to get oxygen.

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At the start of each heartbeat a small electrical signal at the top of the heart spreads through the heart muscle to contract it. It first send to the atria.

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Your heart lies between the two lungs and chest cavity. The heart is at the center of the circulatory system.

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When the ventricle contract the atrium, the atrium relax. Then it will allow them to fill with blood to start the next beat

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The atrium pump blood through the open valve into the ventricle. Afterwards electrical post travels to the ventricle, carrying out blood from your heart circulate to the lungs.

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The chambers are made of up heart muscles.

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The refreshing oxygenated blood from the lungs goes into the the left side of the heart. Then pumps to all parts of your body.

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Your lungs take out waste and Carbon Dioxide and refills it with oxygen.

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The heart is divided into 2 pumps. The right of the heart receives the low blood that is low on oxygen. It come from veins all over the body then pumps the blood. Additionally, the the blood that comes from the tissue and organs also enters the right of the heart. Then pump into your lungs.

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The heart can pump a thousand gallon of blood. It can beat more than 100 times a day.

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The normal heart have two sides a right and left side with four chambers. The top left and right is the left and right Atrium. The bottom left and right is the right and left Ventricle.