The Urinary System - Pearson

Overview of the Urinary System Anatomy of the Kidneys Overview of Renal Physiology Renal Physiology I: Glomerular Filtration Renal Physiology II: Tubular Reabsorption and Secretion Renal Physiology III: Regulation of Urine Concentration and Volume Putting It All Together: The Big Picture of Renal Physiology Urine and Renal Clearance Urine Transport, Storage, and Elimination 976 Animals living in an aquatic environment face little risk of becoming dehy-drated. However, animals that started to spend more time on dry land millions of years ago needed mechanisms to conserve water and prevent dehydration. The organ System that performs this function in humans the Urinary System is the topic of this chapter.

calyces drains into a larger major calyx (shown in Figure 24.3a). Two to three major calyces, in turn, drain urine into the large collecting chamber that is the renal pelvis, which leads into the ureter. Smooth muscle tissue in the walls of the calyces and renal pelvis contracts to help propel urine toward the ureter. Both the

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  System, Nidra, Urinary, The urinary system

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