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- 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)
www.verywellhealth.com/heart-anatomy-8654202
Your heart’s main function is to move blood throughout your body. Blood brings oxygen and nutrients to your cells. It also takes away carbon dioxide and other waste so other organs can dispose of them. Your heart also: Controls the rhythm and speed of your heart rate. Maintains your blood pressure.
There is a layer of muscular tissue (septum) that divides the heart walls into the left and right sides. The heart walls have three layers: endocardium (inner layer), myocardium (muscular middle layer) and epicardium (protective outer layer that makes up one layer of the pericardium).
Oct 31, 2024 · In humans it is situated between the two lungs and slightly to the left of centre, behind the breastbone; it rests on the diaphragm, the muscular partition between the chest and the abdominal cavity. The heart consists of several layers of a tough muscular wall, the myocardium.
- 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 11, 2024 · Summary. The heart is the pump that moves blood around your body. It has four main parts: two upper chambers called atria and two lower chambers called ventricles. These parts work together to get oxygen-rich blood to your body and oxygen-poor blood back to your heart.
Sep 4, 2024 · What are the four main parts of the circulatory system? The parts of your circulatory system are your: Heart. This muscular organ pumps blood throughout your body. Your heart is the only circulatory system organ. Your lungs are part of your respiratory system. Arteries.
Nov 3, 2023 · The heart is a muscular organ that pumps blood around the body by circulating it through the circulatory/vascular system. It is found in the middle mediastinum, wrapped in a two-layered serous sac called the pericardium.
Structure and Function. The heart is subdivided by septa into right and left halves, and a constriction subdivides each half of the organ into two cavities, the upper cavity being called the atrium, the lower the ventricle. The heart, therefore, consists of four chambers: right atrium. left atrium. right ventricle. left ventricle [6].
