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All vessels leaving the heart are arteries, the largest being the Aorta and leaving the left heart ventricle carrying blood rich in oxygen and poor in carbon dioxide (this one carries the blood from the heart, and branches off to supply blood to your head and neck, your arms, then your abdomen, and then your legs), and there are also 2 pulmonary arteries that carry the blood to the lungs, and leaving from the right ventricle: this blood is poor in oxygen, but rich in carbon dioxide. The vessels bring the blood to the heart are all veins: 2 vena cava (the superior one brings the blood from your arms and head&neck, and the inferior one brings blood form your abdomen and legs) bring oxygen poor in oxygen and rich in carbon dioxide to the heard, whereas 4 pulmonary veins bring blood rich in oxygen to your heart from your lungs, and this blood is poor in carbon dioxide. In summary: your heart pumps from the left ventricle blood rich oxygen to your entire body through arteries. The oxygen is used up, and the blood returns through veins back to the heart, carrying carbon dioxide. The blood arrives at the right atrium of the heard, and then is pumped by the right ventricle to the lungs where the air that you breath in enriches the blood with oxygen, and the air that you breath out gets rid of the carbon dioxide. The oxygen rich blood then returns to hearth through the pulmonary veins, before going through the left atrium and then the left ventricle where the cycle starts again. Arteries: Carry blood FROM the heart Veins: Carry blood TO the heart

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16y ago

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