Blood enters the left atrium. Blood moves into the left ventricle. Blood is pumped into the aorta, which carries oxygenated blood around the body. Pulmonary artery Carries deoxygenated blood from the heart to the lungs.
Pulmonary vein Carries oxygenated blood from the lungs to the heart. Aorta Carries oxygenated blood from the heart around the body. Hepatic artery Carries oxygenated blood to the liver. Hepatic vein Carries deoxygenated blood back to the heart. Carries digested food glucose and amino acids from the liver around the body. Hepatic portal vein Carries digested food from the small intestine to the liver.
Renal artery Carries oxygenated blood also rich in urea to the kidneys for excretion. The left ventricle is the pump for the systemic circuit, which provides the blood supply for the tissue cells of the body. Pulmonary circulation transports oxygen -poor blood from the right ventricle to the lungs, where blood picks up a new blood supply.
Then it returns the oxygen-rich blood to the left atrium. The systemic circulation provides the functional blood supply to all body tissue. It carries oxygen and nutrients to the cells and picks up carbon dioxide and waste products. Systemic circulation carries oxygenated blood from the left ventricle, through the arteries , to the capillaries in the tissues of the body. From the tissue capillaries, the deoxygenated blood returns through a system of veins to the right atrium of the heart. The pulmonary valve manages blood flow out of the right ventricle through the pulmonary trunk into the pulmonary arteries.
The muscular wall of the heart powers contraction and dilation. Each contraction and relaxation is a heartbeat. Ventricular contractions, called systole , force blood out of the heart through the pulmonary and aortic valves. Diastole occurs when blood flows from the atria to fill the ventricles.
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