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Overview. Your heart is a muscular organ that pumps blood to your body. What is the heart? The heart is a fist-sized organ that pumps blood throughout your body. It’s your circulatory system ’s main organ. Muscle and tissue make up this powerhouse organ. Advertisement. Cleveland Clinic is a non-profit academic medical center.
Oct 4, 2019 · The pumping action of the heart allows the movement of many substances between organs in the body, including nutrients, waste products, and hormones and other chemical messengers. However, arguably the most important substance it circulates is oxygen. Oxygen is required for animal cells to perform cellular respiration.
Nov 10, 2024 · The heart functions as a vital pump responsible for circulating blood throughout the body. Its primary role is to maintain the flow of oxygenated and deoxygenated blood to sustain bodily functions. The heart achieves this through a coordinated system of chambers, valves, and electrical impulses, which work together to regulate blood flow, pressure, and oxygen delivery.
Jul 29, 2020 · Summary. The heart is a complex organ that pumps blood throughout the body. It sits in the chest, slightly left of center, behind the breastbone, and between the lungs. A heart that is not...
Sep 21, 2018 · Left atrium. This chamber receives oxygenated blood from the pulmonary veins of the lungs and pumps it to the left ventricle. Left ventricle. With the thickest muscle mass of all the chambers,...
Jun 6, 2023 · The right ventricle pumps the low-oxygen blood into the pulmonary artery, which leads to the lungs (pulmonary circulation). In the lungs, the blood releases carbon dioxide and picks up oxygen. This oxygen-rich blood then flows back to the heart through the pulmonary veins – this time to the left side of the heart.
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The heart's pumping action is regulated by an electrical conduction system that coordinates the contraction of the various chambers of the heart. How does the heart beat? An electrical stimulus is generated by the sinus node (also called the sinoatrial node, or SA node).
