Chapter 44- The Urinary System

Chapter 44- The Urinary System - Chapter 44 The Urinary...

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Chapter 44 The Urinary System The digestive system is unselective (eat) The excretory system restores and maintains the proper internal amount minerals, water, sugar, protein, fat, etc in the body despite differences in diet Functions of Excretory Systems All performed simultaneously as blood is selectively filtered by kidneys; water and nutrients returned to blood 1. Excretion of cellular waste products a. In cells, amino acids are broken into simpler molecules releasing ammonia b. In liver, ammonia is combined with CO2 to produce urea c. In the kidneys, urea and other water soluble wastes are converted to urine 2. Regulation of fluid composition (ions, water, nutrients) 3. Secretion of hormones a. Gland on top of kidneys is called adrenal gland…produces adrenaline b. When talking about kidneys were are taking about the renal system Vertebrate Excretory System 1. Kidney (filter) o Figure 44.14 o 2 million nephrons in kidneys (1 million in each) o Renal artery carries oxygenated blood into kidney
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This note was uploaded on 02/05/2011 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

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Chapter 44- The Urinary System - Chapter 44 The Urinary...

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