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The Effect of Exercise on Heart Rate
Member rating: No Rating | Words: | Submitted: Sun Aug 17 2003
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The Effect of Exercise on Heart Rate Introduction The heart is the organ that works as a pump to circulate the blood around the body. It is a four-chambered double pump that is the centre of the circulatory system. It is located between the two lungs and slightly to the left of centre. The heart consists of several layers of a tough muscular wall, known as the myocardium. A thin layer of tissue, called the pericardium, covers the outside, and another layer, the endocardium, lines the inside. There are two chambers in the heart. The upper chamber is called an atrium or auricle, and the lower chamber is called a ventricle. The two atria act as receiving chambers for blood entering the heart. The more muscular ventricles pump the blood out of the heart. Blood is a fluid substance that circulates in the arteries and veins of the body. Blood is bright...
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