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Urinary System

Urinary System. Kidney. A = cortex B = medulla Arrow = hilus. The functional unit is the nephron. Arrow = capsule Arrowheads = renal corpuscles. Comparison of proximal and distal tubules • Proximal tubule •Large diameter lumen •More eosinophilic •Lumen often stellate

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Urinary System

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  1. Urinary System

  2. Kidney A = cortex B = medulla Arrow = hilus

  3. The functional unit is the nephron

  4. Arrow = capsule Arrowheads = renal corpuscles

  5. Comparison of proximal and distal tubules •Proximal tubule •Large diameter lumen •More eosinophilic •Lumen often stellate •Brush boarder visible •Fewer nuclei seen in cross section •More abundant than D.T. •Distal tubule •Smaller dia. Lumen •Less eosinophilic •Lumen circular •Brush boarder not visible •More nuclei seen in cross section •Less abundant than P.T

  6. Arrowheads = proximal tubules

  7. A = distal tubules

  8. Ureter Arrowhead = blood vessels Arrow = adipose tissue in adventitia

  9. Double nuclei in cell of transitional epithelium

  10. Urinary Bladder Arrowhead = serosa Arrow = smooth muscle

  11. Note highly cellular submucosa

  12. Bladder in relaxed state

  13. Slightly more filled bladder

  14. Urethra Arrowhead = lamina propria Arrow = muscularis

  15. Arrow = transitional epithelium Arrowhead = lamina propria M = muscle

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