urea or uric acid. Osmolarity is controlled by selective reabsorption/secretion. C 5 types of excretory systems: None in porifera‚ cnidaria Protonephridia in planaria & rotifers Metanephridia in annelids Malpighian tubules in terrestrial arthropods Kidneys (with nephrons) in vertebrates Protonephridia Have flame bulbs‚ tubules‚ and nephridopores. C Flame bulbs selectively filter body fluid to nitrogenous waste. C Fluid collects in tubules and drips outside through the nephridopore. Metanephridia
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Kidney From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search For other uses‚ see Kidney (disambiguation). Kidney | | Human kidneys viewed from behind with spine removed | Latin | Ren (Greek: nephros) | Artery | renal artery | Vein | renal vein | Nerve | renal plexus | The kidneys are organs that serve several essential regulatory roles in most animals‚ including vertebrates and some invertebrates. They are essential in the urinary system and also serve homeostatic functions such
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Primary functions of the kidney: — Maintaining homeostasis through the regulation of fluid and electrolytes and removing wastes through the formation of urine. ž Other important functions: — Regulation of acid-base balance — Control of blood pressure — Renal clearance — Regulation of RBC production — Synthesizing vitamin D to the active form — Secreting prostaglandins — Regulating calcium and phosphorus balance. Nephron ž Each kidney has about 1 million
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The liver converts excess protein into urea. The kidneys remove unwanted substances such as urea‚ excess water and salt. © Boardworks Ltd 2009 What is urea? Excess amino acids in the body are broken down by the liver‚ producing a waste substance called urea. This process is important because it converts toxic ammonia to urea‚ which is done using carbon dioxide. Once formed‚ urea is transported by the circulatory system to the kidneys. The kidneys filter the blood‚ removing urea and excess water
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Kidneys * Kidneys maintain the purity and constancy of our in internal fluids. Every day‚ the kidneys filter gallons of fluid from the bloodstream. They then process this filtrate‚ allowing wastes and excess ions to leave the body in urine while returning needed substances to the blood in just the right proportions. Kidneys also regulate the blood’s volume and chemical makeup so that the proper balance between water and salts and between acids and bases is maintained. * The Kidneys alone
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symptomfind.com/health/preventing-kidney-stones/ http://www.medicinenet.com/polycystic_kidney_disease/page2.htm 10 Important Tips For Preventing Kidney Stones By MaryAnn DePietroΙ March 13‚ 2012 AA Kidney stones are hard‚ small masses‚ which can develop inside the kidneys. Risk factors include family history‚ dehydration‚ obesity‚ taking certain types of medications and eating a diet high in protein and salt. Stones can become very painful as they travel from the kidney and move into the ureter. In
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Kidneys for sale: poor Iranians compete to sell their organs In the only country where the organ trade is legal‚ the streets near hospitals have been turned into a ’kidney eBay’ Would-be sellers advertise their kidneys by writing their blood type and phone number on posters or walls of the street close to several of Tehran’s major hospitals. Photograph: Torab Sinapour for the Guardian Marzieh’s biggest challenge in life is to come up with money for her daughter’s wedding. In Persian custom‚ it
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donors are recruited (or learn through word-of-mouth and volunteer) and flown to another nation‚ where the organ is removed in a makeshift operating room. KIDNEY THEFT While at first believed to be a true but surreal horror story (often involving the victim waking up in a bathtub full of bloody ice cubes)‚ and then dismissed as an urban legend‚ kidney theft has been known to happen. A day laborer‚ Mohammad Salim Khan‚ who lived close to Delhi‚ India‚ was looking for a day’s wages when he agreed to go
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out that I needed a kidney transplant. About Three hours later we show up at Children Mercy hospital at about 8:15 when our appointment was at 8:00‚ which is actually early for my family‚ because my family is always late. We go up to the first floor and go to the kidney center. On the way over to the kidney center my mom and dad still contently ask if I’m ok and telling me that everything will be alright. We finally get into the kidney center and I get signed in. This kidney appointment was different
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Should it be legal to buy a kidney? Kidneys are organs in the body‚ shaped like beans which are almost as big as a persons fist. Every person has two kidney’s‚ one near the middle of the back‚ below the rib cage and the other on each side of the back spine. The kidney’s job is to clear waste from the bodies blood and use the extra water and waste to turn to urine‚ releasing it from the ureters through urination. Each day‚ the kidney cleans around two-hundred quarts of blood‚ finally gathering two
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