![]() ![]() These arteries branch off from the aorta so that oxygen-rich blood is delivered to your heart as well as the rest of your body. Your coronary arteries supply blood to your heart. Like other muscles in the body, your heart needs blood to get oxygen and nutrients. A problem with the electrical system-or the nervous or endocrine systems, which control your heart rate and blood pressure-can also make it harder for the heart to pump blood.Įxplore this Health Topic to learn more about how the heart works, our role in research to improve health, and where to find more information. ![]() If disease or injury weakens your heart, your body’s organs will not receive enough blood to work normally. A healthy heart supplies your body with the right amount of blood at the rate needed to work well. Your heart’s electrical system controls the rate and rhythm of your heartbeat. Inside your heart, valves keep blood flowing in the right direction. Blood also carries carbon dioxide to your lungs so you can breathe it out. Your blood carries the oxygen and nutrients that your organs need to work properly. This system is a network of blood vessels, such as arteries, veins, and capillaries, that carries blood to and from all areas of your body. Your heart is at the center of your circulatory system. It is made up of multiple layers of tissue. The heart is an organ about the size of your fist that pumps blood through your body. ![]()
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