![]() ![]() The cycle begins again.Īn electrical system in the heart makes sure the heart beats in a regular rhythm and normal rate. The right atrium fills with oxygen-poor blood. ![]() Veins carry the oxygen-poor body back to the right atrium. The oxygen-rich blood travels throughout your body.The left ventricle pumps the oxygen-rich blood into the aorta through the aortic valve and out to the rest of your body. ![]() When the left atrium contracts, the mitral valve between the left atrium and left ventricle opens.Oxygen-rich blood then flows into the left atrium. In the lungs, carbon dioxide is removed and fresh oxygen is added to the blood.When the right ventricle is full it contracts and pumps the blood to the lungs through the pulmonary valve.The blood flows into the right ventricle. When the atrium contracts, the tricuspid valve between the right atrium and the right ventricle opens. When the right atrium becomes full, it contracts. The right atrium is full of oxygen-poor blood from your body (muscles, organs, brain and heart).With each beat of your heart, blood is pushed through your arteries. This action is similar to clenching and unclenching your fist. To pump blood throughout the body, your heart contracts then relaxes. Valves can be damaged by infection (endocarditis), rheumatic heart disease, congenital heart defect, normal aging and wear. If a valve becomes narrowed (valve stenosis), blood flow through the heart may be restricted. For example, If a valve doesn’t close correctly, blood may leak between the chambers or flow backwards (valve regurgitation, insufficiency or incompetence). Valves that don’t work properly can lead to different types of valvular heart disease. The heart “beats” that your doctor hears with their stethoscope is the sound of your valves opening and closing to let blood through. These one-way valves keep the blood flowing in one direction through the different chambers of the heart and out to the body. The four chambers are separated by one-way valves that open and close with every heartbeat. The left side receives oxygen-rich blood from the lungs. On the left side of the heart, there is a left atrium and a left ventricle. The right side receives oxygen-poor blood from the rest of the body. On the right side of the heart, there is a right atrium and a right ventricle. The two chambers on the top are called atria and the two chambers on the bottom are called ventricles.Ī muscular wall called the septum separates the right side of the heart from the left. Your heart is divided into four sections or chambers. ![]()
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