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Gross anatomy of the human heart pdf9/21/2023 It is also made up of four valves: the tricuspid, pulmonary, mitral and aortic valves. MORE FROM MICHIGAN: Sign up for our weekly newsletter The heart is made up of four chambers: two upper chambers known as the left atrium and right atrium and two lower chambers called the left and right ventricles. Blood is returned to the heart through venules and veins. It pushes blood to the body’s organs, tissues and cells.īlood delivers oxygen and nutrients to every cell and removes the carbon dioxide and other waste products made by those cells.īlood is carried from the heart to the rest of the body through a complex network of arteries, arterioles and capillaries. Located between the lungs in the middle of the chest, the heart pumps blood through the network of arteries and veins known as the cardiovascular system. In fact, the heart does more physical work than any other muscle over a lifetime. LISTEN UP: Add the new Michigan Medicine News Break to your Alexa-enabled device, or subscribe to our daily audio updates on iTunes, Google Play and Stitcher. That’s a lot of work for an organ no bigger than a large fist and weighing 8 to 12 ounces. This story was updated on January 31, 2020.Įach day, the average human heart beats about 100,000 times, pumping 2,000 gallons of blood through the body.
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