The Kidney - Research Paper by Biancageorgiou

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The Kidney Essay

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Below is an essay on "The Kidney" from Anti Essays, your source for research papers, essays, and term paper examples.

When examined under a microscope, the kidney is seen to be composed of a large number of structures called nephrons and collecting ducts. The nephron is the function unit of the kidney as it is where the urine is formed. There are about 1.2 million nephorns in each human kidney and each is surrounded by a complex network of blood capillaries. Each nephron consists of a renal corpuscle and a renal tubule. The nephron begins with a expanded end called the glomerular capsule(formerly known as the Bowman’s capsule). It looks like a double –walled cup this surrounds and almost completely encloses, a knot of arterial capillaries called the glomerulus. Leading away from the glomerular. Leading from the glomerular is a tube approximately 5 cm long this is called the renal tube. This begins with a a winding section called the proximal convoluted tubule past this each tubule has a straight section before it forms a loop, the loop of Henle. The loop of Henle is like a hairpin bend with a straight section leading into the bend and another straight section leading away from the bend, then it becomes coiled again. The second coiled section is known as the distal convoluted tubule. The distal tubules of several nephrons join into a collecting duct that opens into a chamber in the kidney called the renal pelvis. This is shaped like a funnel and it channels fluid from the collection ducts into the ureter. The nephrons of the kidney are yet responsible for removing the wastes from the blood and regulating blood composition. To be able to do this, they are well supplied with blood vessels. Blood enters through the renal arteries. These arteries are quite large so that together the two kidneys receive about a quarter of the blood from the left side of the heart, with about 1.2 litres of blood passing through the two kidneys every minute. The renal artery, shortly after entering the kidney, divides into small arteries and arterioles. Each renal corpuscle is supplied by an arteriole,...

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