Urinary+System_presentation_2006

Urinary+System_presentation_2006 - The Urinary System...

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The Urinary System The Urinary System Objectives Identify and describe the components of the urinary system and their function Describe the histological organization of the nephron Identify the blood vessels that supply blood to the nephrons Describe the blood flow through and around the nephron
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Organs of the Urinary System Kidney Ureter
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Kidney Bean-shaped Retroperitoneal position Right kidney is slightly lower Medial surface – hilum leads to sinus Adrenal gland
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Supportive tissue layers Three layers Renal fascia Fibrous, anchors to surrounding tissues Adipose capsule cushions/attaches kidney renoptosis Renal capsule protects from trauma and infection
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Sectional Anatomy Cortex: outer layer, light reddish brown, granular appearance due to capillaries Medulla: inner core, darker striped appearance due to tubules. Subdivided into renal pyramids terminating with a renal papilla and s eparated by renal columns. Sinus: houses renal pelvis
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Medulla Renal Pyramids triangular shaped units that house the loops of Henle and collecting ducts of the nephron; site for the counter-current system that concentrates salt and conserves water and urea Renal Papilla tip of the renal pyramid that releases urine into a calyx Renal Column a passageway located between the renal pyramids and used as a space for blood vessels
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Urine collection contain smooth muscle contain smooth muscle a collecting sac Ureter
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Blood supply
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SEGMENTAL A.
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Capillary beds of the nephron I capillary bed for filtration is the glomerulus that produces the filtrate II capillary bed for absorption are Peritubular capillaries from efferent arteriole, in cortex transport reabsorbed materials from the PCT/ DCT into kidney veins help complete the conservation process (reabsorption) Vasa recta around the loop of Henle, in medulla urine concentration
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Kidney Diagram Capsule Renal Vein Renal Artery Cortex Pyramid Papilla Calyx Pelvis Ureter Column Medulla Nephron
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Functional unit - nephron Renal tubule with associated blood vessels: PCT, LOH, DCT Renal corpuscle: Glomerulus Bowman’s capsule Cortical nephrons 85% have short LOH, produce "standard" urine Juxtamedullary nephrons next to the medulla – have long LOH, responsive to ADH, concentrate urine CD
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Kidney Nephron Efferent arteriole Afferent arteriole Bowman’s capsule Collectin g duct Proximal convoluted tubule Glomerulus Peritubular capillaries Vasa recta Decending limb of loop of Henle Ascending limb of loop of Henle Distal convoluted tubule Papillary duct
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Glomerulus is a capillary bed lying between the afferent and efferent arteriole, surrounded by Bowman’s capsule Afferent Arteriole Efferent Arteriole Renal corpuscle
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This note was uploaded on 06/28/2008 for the course KINS 2532 taught by Professor Sturges during the Spring '08 term at Georgia Southern University .

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Urinary+System_presentation_2006 - The Urinary System...

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