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16 juil. 2024 · The Normal Heart focuses on the stories of those who bravely battled the disease in those early years and it has resonated with people in the community and theatre patrons worldwide since the play’s debut in 1985.
5 juil. 2024 · 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...
The heart is located in the thoracic cavity medial to the lungs and posterior to the sternum. On its superior end, the base of the heart is attached to the aorta, pulmonary arteries and veins, and the vena cava. The inferior tip of the heart, known as the apex, rests just superior to the diaphragm.
Il y a 2 jours · The normal resting heart rate is called the sinus rhythm, created and sustained by the sinoatrial node, a group of pacemaking cells found in the wall of the right atrium. Cells in the sinoatrial node do this by creating an action potential.
17 juil. 2024 · The Normal Heart 2014 Drama. 2014 Drama. In 1980s New York, a writer (Mark Ruffalo) and his friends join forces to expose the truth about the emerging AIDs crisis to both the government and the gay community.
Il y a 5 jours · The heart is a muscular pumping organ located medial to the lungs along the body's midline in the thoracic region. The bottom tip of the heart, known as its apex, is turned to the left, so that about 2/3 of the heart is located on the body's left side with the other 1/3 on right.
22 juil. 2024 · A normal resting heart rate is between 60 and 100 bpm. Resting heart rates of less than 60 bpm are also normal during sleep and in physically fit individuals. Heart rates below 30 bpm or above 250 bpm are typically due to an arrhythmia and are potentially serious.
