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The heart is a muscular organ found in most animals. This organ pumps blood through the blood vessels of the circulatory system. The pumped blood carries oxygen and nutrients to the body, while carrying metabolic waste such as carbon dioxide to the lungs.
- Heart (Disambiguation)
A heart is a muscular organ that pumps blood in various...
- Talk
We would like to show you a description here but the site...
- Metabolic Waste
Nitrogen wastes. The nitrogen compounds through which excess...
- Heart (band)
Heart is an American rock band formed in 1973 in Seattle,...
- Heart Discography
The discography of the American rock band Heart consists of...
- Anatomy of the human heart
The heart has the shape of a pyramid, with its apex pointing...
- Cardiac physiology
Cardiac physiology or heart function is the study of...
- Heart (Disambiguation)
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May 16, 2024 · Learn about the heart, a muscular organ that pumps blood through the body and lungs. Explore its structure, function, diagram, and facts from Britannica, the trusted source of knowledge.
- The Editors of Encyclopaedia Britannica
- Where is the heart located in the human body?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...
- What is the heart wall made up of?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...
- What causes the heart to beat?The pumping of the heart, or the heartbeat, is caused by alternating contractions and relaxations of the myocardium. These contractions are stimula...
- What are heart sounds?The rhythmic noises accompanying the heartbeat are called heart sounds. The two distinct sounds are heard, a low, slightly prolonged “lub” (first s...
The human heart has four chambers or closed spaces. Some animals have only two or three chambers. Heart structure: Arrows show the direction of blood flow. In humans, the four chambers are two atria and two ventricles. Atria is talking about two chambers; atrium is talking about one chamber.
