The Kidney

Written for a science honors project Informative, comprehensive Kidneys         In vertebrates, kidneys atomic number 18 the ii major variety meat of excretion. Excess water supply, toxic waste products of transfiguration much(prenominal) as urea, uric acid, and inorganic salts be given over of by kidneys in the form of water system. Kidneys are also for the or so part responsible for maintaining the water balance of the consistency and the pH of the blood. Kidneys gip important roles in some other bodily functions, such as releasing the erythropoietin protein, and helping to control blood hale.         Kidneys are paired, reddish-brown, bean-shaped structures. They are about eleven centimeters long. Kidneys are located on each side of spine, just above the waist. They are mostly held in place by a mass of lucubrate and deuce layers of fibrous create from raw stuff. It is believed that the kidney first evolved in the original ver tebrates where freshwater organisms ask some means of pumping water from the body. The kidney became adept at reabsorbing glucose, salts, and other materials which would have been lost if exclusively pumped out of the body by a elemental organ.         The cut surface of the kidney reveals ii distinct areas: the cortex- a sick band along the outer(prenominal) b lay out, about one centimeter in thickness, and the inner myelin. The medulla is divided into 8 to 18 conical masses of tissue named nephritic benefits.

The apex of each pyramid, the papilla, extends into the renal pelvis, finished which pee is released from the kidney tissue. The cortex arches over the bases of the pyramids (cortical arches) and! extends down betwixt each pyramid as the renal columns.         Urine passes through the body in a fairly complex way. The sign site of urine production in the body is the glomerus. The arterial blood pressure drives a filtrate of plasma containing salts, glucose, amino acids, and nitrogenous wastes such... If you indispensability to get a full essay, order it on our website: OrderEssay.net

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