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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. Learn more about the heart in this article.
Understanding the Context
The heart is a muscular organ found in humans and other animals. This organ pumps blood through the blood vessels. [1] The heart and blood vessels together make up the circulatory system. [2] The pumped blood carries oxygen and nutrients to the tissue, while carrying metabolic waste such as carbon dioxide to the lungs.
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[3] In humans, the heart is approximately the size of a closed fist and is ... Your heart is a vital organ that keeps blood pumping through your body. Learn more about your heart. Learn more about the American Heart Association's efforts to reduce death caused by heart disease and stroke. Also learn about cardiovascular conditions, ECC and CPR, donating, heart disease information for healthcare professionals, caregivers, and educators and healthy living.
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American Heart Association | To be a relentless force for a world of ... How the Heart Works - What the Heart Looks Like | NHLBI, NIH Learn about the anatomy of the heart and how its chambers, valves, and vessels work together to maintain effective blood circulation throughout the body to sustain life. Heart symbols are Unicode characters and emojis that people commonly use to express love, affection, support, and emotion in digital text. This page includes heart keyboard text symbols, heart emoticons, and heart emojis that you can copy and paste into any application. In everyday writing you may see hearts like ♥, ♡, , and 💜 used to add a warm tone or highlight caring intent.