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- Dictionaryheart/hɑːt/
noun
- 1. a hollow muscular organ that pumps the blood through the circulatory system by rhythmic contraction and dilation. In vertebrates there may be up to four chambers (as in humans), with two atria and two ventricles. Similar
- 2. the central or innermost part of something: "right in the heart of the city" Similar Opposite
verb
- 1. like very much; love: informal "I totally heart this song"
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Heart - Wikipedia. The heart is a muscular organ found in most animals. This organ pumps blood through the blood vessels of the circulatory system. [1] . The pumped blood carries oxygen and nutrients to the body, while carrying metabolic waste such as carbon dioxide to the lungs. [2] .
Learn the meanings and usage of the word heart in English, with different senses and idioms. Find out how to say heart as an organ, an emotion, a shape, a suit, and more.
Learn the various meanings and uses of the word heart, from the muscular organ that pumps blood to the symbol of love and emotion. See synonyms, examples, etymology, and related phrases of heart.
5 days ago · 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.
- 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...
- Heart Definition
- Function of The Heart
- Heart Structure
- Quiz
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The heart is a muscular organ that pumps blood throughout the body. It is located in the middle cavity of the chest, between the lungs. In most people, the heart is located on the left side of the chest, beneath the breastbone. The heart is composed of smooth muscle. It has four chambers which contract in a specific order, allowing the human heart ...
The heart pumps blood through our immense and complicated circulatory systems at high pressure. It is a truly impressive feat of engineering, as it must circulate about five liters of blood through a full 1,000 miles worth of blood vessels each minute! We will talk more about how the heart accomplishes this remarkable task under the “Heart Structur...
The heart’s unique design allows it to accomplish the incredible task of circulating blood through the human body. Here we will review its essential components, and how and why blood passes through them.
1. Which of the following is NOT true of the human heart? A. It has four chambers. B. It has a built-in “pacemaker” called the sinoatrial node. C. It is responsible for pumping oxygen-filled blood around the body. D.It is the only organ in the body you cannot live without. 2. Which of the following is NOT a layer of the heart? A. The myocardium B. ...
Learn what the heart is, how it works, and what its main components are. The heart is a muscular organ that pumps blood throughout the body, and has four chambers, two ventricles, and four valves.
Learn the meaning of heart as an organ, an emotion, a shape, a suit of cards, and more. See how to use heart in sentences and idioms with examples from the Cambridge Dictionary.
Learn the anatomy, zoology, and symbolism of the heart, the organ of blood circulation and the center of emotion. Find out the origin, usage, and expressions of the word heart in English.
