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The Urinary System

Lab # 8. The Urinary System. The Urinary System. Kidneys. Ureters. Urinary bladder. Urethra. (a) Anterior view. (b) Posterior view. Anatomy of Kidney. The kidneys lie against posterior abdominal wall at level of T12 to L3.

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The Urinary System

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  1. Lab # 8 The Urinary System

  2. The Urinary System Kidneys Ureters Urinary bladder Urethra (a) Anterior view (b) Posterior view

  3. Anatomy of Kidney • The kidneys lie against posterior abdominal wall at level of T12 to L3 • They are retroperitoneal along with ureters, urinary bladder, renal artery and vein, and adrenal glands Stomach Small intestine Pancreas Hilum Visceral Peritoneum Parietal Peritoneum Lumbar muscles Renal fascia Perirenalfat capsule Fibrous capsule

  4. Fibrous capsule Parenchyma: Renal cortex Renal column Renal pyramid Renal medulla Renal artery Renal vein Renal lobule Renal pelvis Major calyces Renal papilla Minor calyces Ureter Parenchyma Renal sinus Hilum

  5. Renal Circulation Glomerulus Afferent arteriole Efferent arteriole Segmental artery Peritubular capillaries Renal artery Interlobular vein Renal vein Arcuate vein Arcuate artery Interlobular artery Interlobar artery and vein Arcuate artery and vein Interlobular (cortical radiate) artery and vein

  6. The Nephron The nephrons are the functional units of the kidneys. Each kidney has about 1.2 million nephrons Renal Corpuscle - Glomerulus - Glomerular (Bowman) capsule Parietal layer (simple squamous epithelium) Visceral layer (podocytes) Capsular space Nephron Renal Tubule Proximal convoluted tubule (PCT) Distal convoluted tubule (DCT) - Proximal convoluted tubule (PCT) - Nephron loop (loop of Henle) - Distal convoluted tubule (DCT) Renal corpuscle - Collecting duct Nephron loop (loop of Henle) Collecting duct (CD)

  7. The Renal Corpuscle Glomerular capsule: Parietal layer Capsular space Afferent arteriole Podocytes of visceral layer Blood flow Proximal convoluted tubule Efferent arteriole Glomerular capillaries (podocytes and capillary wall removed) Blood flow

  8. Transitional epithelium The Urinary Bladder

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