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Jun 11, 2024 · The heart is a vital, fist-sized muscular organ located slightly on the left side of the chest. It consists of four main chambers: two atria and two ventricles. Understanding its basic anatomy is crucial to understanding how it functions.
Jun 11, 2024 · Heart, organ that serves as a pump to circulate the blood. It may be as simple as a straight tube, as in spiders and annelid worms, or as complex as the four-chambered double pump that is the center of the circulatory system in humans, other mammals, and birds.
- The Editors of Encyclopaedia Britannica
- In humans, the heart is situated between the two lungs and slightly to the left of center, behind the breastbone. It rests on the diaphragm, the mu...
- The heart consists of several layers of a tough muscular wall, the myocardium. A thin layer of tissue, the pericardium, covers the outside, and ano...
- The pumping of the heart, or the heartbeat, is caused by alternating contractions and relaxations of the myocardium. These contractions are stimula...
- The rhythmic noises accompanying the heartbeat are called heart sounds. The two distinct sounds are heard, a low, slightly prolonged “lub” (first s...
Jun 10, 2024 · The development of the heart begins with the formation of the primitive heart tube following embryonic folding. In this article we shall consider the embryonic development of the heart as well as some important clinical conditions associated with failure of this process.
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Jun 19, 2024 · Your heart is a muscular organ about the size of a fist located in the chest cavity close to the lungs. It functions as a pump, consistently circulating blood throughout the body. The heart...
3 days ago · McGarry exclusively told Us this month that he doesn’t think fans will say “yes” after seeing the cliffhanger, but he hopes they’re “satisfied” with where Nathan and Elizabeth stand ...
2 days ago · More: Meet the When Calls the Heart Cast’s Real-Life Partners. “Okay, hear me out …. Jack is alive! I still think there is hope to bring Jack back!” one optimistic fan wrote in a Reddit thread. “After the accident, two men were pulled out. …. Jack, being ever the generous man, traded coats with the other man because of a tear (or ...
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22 hours ago · The flow of blood from the body cells to the heart and then back out from the heart to the cells. Systole. The contraction phase of the heartbeat. From the Greek systole, meaning contraction. Study with Quizlet and memorize flashcards containing terms like Aorta, Arteriole, Artery and more.
