The blood is squeezed down into the right lower chamber ventricle and taken by an artery to the lungs where the carbon dioxide is replaced with oxygen. The left side of the heart The oxygenated blood travels back to the heart, this time entering the left upper chamber atrium.
It is pumped into the left lower chamber ventricle and then into the aorta an artery. The blood starts its journey around the body once more. Blood vessels Blood vessels have a range of different sizes and structures, depending on their role in the body. Arteries Oxygenated blood is pumped from the heart along arteries, which are muscular.
Arteries divide like tree branches until they are slender. The largest artery is the aorta, which connects to the heart and picks up oxygenated blood from the left ventricle. The only artery that picks up deoxygenated blood is the pulmonary artery, which runs between the heart and lungs. Capillaries The arteries eventually divide down into the smallest blood vessel, the capillary. Capillaries are so small that blood cells can only move through them one at a time.
Oxygen and food nutrients pass from these capillaries to the cells. Capillaries are also connected to veins, so wastes from the cells can be transferred to the blood. Veins Veins have one-way valves instead of muscles, to stop blood from running back the wrong way. The 2 upper chambers are the atria. They receive and collect blood. The 2 lower chambers are the ventricles. They pump blood to other parts of your body. Here is the process:.
The right atrium receives blood from the body. This blood is low in oxygen. This is the blood from the veins. The right ventricle pumps the blood from the right atrium into the lungs to pick up oxygen and remove carbon dioxide.
The left ventricle pumps the blood from the left atrium out to the body, supplying all organs with oxygen-rich blood. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience. Necessary Necessary. Necessary cookies are absolutely essential for the website to function properly.
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Advertisement Advertisement. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. This delivery is regulated by the pulmonary valve. The left ventricle collects the pure blood from the left atrium and delivers it to the aorta main artery from where it is pumped to the rest of the body.
This delivery is regulated by the aortic valve. As part of the pulmonary circulation, the pulmonary artery carries the de-oxygenated blood from the right ventricle to the lungs for oxygenation. Blood after oxygenation in the lungs, is brought back to the heart by pulmonary veins and delivered to left atrium.
The Aorta the largest artery in the body, collects blood pumped from the left ventricle to branch and deliver the oxygen rich blood to various organs and tissues in the human body.
The pericardium is the fluid filled sac that surrounds the heart. The heart literally floats in this pericardial fluid. The coronary circulation consists of the blood vessels that supply blood to, and remove blood from, the heart tissue. Coronary arteries supply oxygen rich blood to the heart and the coronary veins remove the deoxygenated blood from the heart. Blood is supplied to the heart by the coronary arteries. Two main coronary arteries branch off the aorta then branch into several smaller arteries that supply oxygen rich blood to the heart.
The deoxygenated blood from the heart muscle is collected by the coronary veins and drained into the right atrium. The heart acts a pump, delivering blood to the organs, tissues, and cells of your body through a complex network of arteries, arterioles, and capillaries.
Blood is returned to your heart through venules small veins and veins.
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