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 urine, toxic waste products of transfiguration much(prenominal) as urea, uric acid, and inorganic salts atomic number 18 given over of by kidneys in the form of water system. Kidneys are also for the nigh 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 in the main held in place by a mass of elaborate and deuce layers of fibrous create from raw stuff. It is believed that the kidney first evolved in the o riginal vertebrates 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 scarce pumped out of the body by a unanalyzable organ.         The cut surface of the kidney reveals ii distinct areas: the cortex- a semidark band along the outer(prenominal) b collection, 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 p elvis, with which pee is released from the! kidney tissue. The cortex arches over the bases of the pyramids (cortical arches) and extends down surrounded by each pyramid as the renal columns.         Urine passes through the body in a fairly complex way. The initial 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: OrderCustomPaper.com

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