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The heart is an amazing organ. It starts beating about 22 days after conception and continuously pumps oxygenated red blood cells and nutrient-rich blood and other compounds like platelets throughout your body to sustain the life of your organs. Its pumping power also pushes blood through organs like the lungs to remove waste products like CO2.
Jun 11, 2024 · Heart Anatomy in Basic Terms. The heart is a crucial organ that functions as the body's pump, ensuring blood circulation throughout the body. It consists of four main chambers: Left and right atria (upper chambers) Left and right ventricles (lower chambers) These chambers work in a coordinated manner to receive oxygen-poor blood, pump it to the ...
Aug 26, 2024 · The heart is a muscular organ responsible for the flow of blood in the body. The heart has a right and a left side, each with an upper chamber (atrium) and lower chamber (ventricle). The right atrium receives oxygen-deprived blood from the body. The blood travels across the tricuspid valve into the right ventricle, which pumps the blood across ...
Oct 31, 2024 · In fishes the heart is a folded tube, with three or four enlarged areas that correspond to the chambers in the mammalian heart. In animals with lungs—amphibians, reptiles, birds, and mammals—the heart shows various stages of evolution from a single to a double pump that circulates blood (1) to the lungs and (2) to the body as a whole.
- 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...
Mar 6, 2021 · One of the first things you will notice if you look at the 12 steps is the pattern between the right and left side of the heart is similar. Step 1 and 6 involve a blood vessel, which makes sense as this is how blood enters and exits that side of the heart. Steps 2-5 involve a chamber, valve, chamber, and valve.
Figure 2. The heart functions as a double ventricle. Blood moves from the body into the right atrium and then into the right ventricle, where it is pumped into the lungs. Blood becomes oxygenated in the lungs, moves into the left atrium and into the left ventricle, where it is pumped into the body again.
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Nov 10, 2024 · The heart is a muscular organ that pumps blood throughout the body via the circulatory system. It is approximately the size of a fist and consists of four chambers: two atria and two ventricles. The heart is composed of specialized muscle tissue, known as myocardium, and is encased within a double-layered protective sac called the
