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Essay / Research Paper Abstract
A 3 page research paper that describes heart anatomy and the circulatory system. Bibliography lists 2 sources.
Page Count:
3 pages (~225 words per page)
File: D0_khcarsy2.rtf
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Unformatted sample text from the term paper:
circular covering of yellow elastic fibers" that have within them a "filling of muscle that absorbs the tremendous pressure wave of each heartbeat," which serves to slow down the blood
(Human Anatomy Online). In each arm and wrist, this pressure can be easily felt and is known as the "pulse (Human Anatomy Online). Arteries divided into smaller arterioles and then
into even smaller vessels, the capillaries, which is the smallest type of blood vessel (Human Anatomy Online). One arteriole brings blood to hundred capillaries (Human Anatomy Online). The blood gives
up the oxygen and nutrients that it carries and begins the journey back to the heart. At this point, the cardiovascular system is rather like a river, as the
blood from tiny capillaries flows into small veins, which, in turn, flow into larger veins (Human Anatomy Online). Veins have "thin, slack walls," which are very different from the walls
in arteries because veins do not have to cope with the immense pressure of the heartbeat. Due to this decrease in pressure, the reddish-blue de-oxygenated blood that moves slowly through
veins is facilitated in that movement by the nature of vein makeup. Blood is re-oxygenated in the lungs and then moves back into the heart via special vessels, the pulmonary
arteries (Human Anatomy Online). Weighing between 7 and 15 ounces, the human heart is generally about the same size as the individuals fist and, over a long lifetime, will
expand and contrast in the process of a heart beat over 3.5 billion times (Texas Heart Institute). In general, a heart beats 100,000 times each day, pumping an average of
2,000 gallons of blood (Texas Heart Institute). It is located between the lungs, in the middle of the chest, "behind and slightly left" of the breastbone (sternum) (Texas Heart Institute).
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