Urinary System.

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Presentation transcript:

Urinary System

A = cortex B = medulla Arrow = hilus 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 •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

Arrowheads = proximal tubules

A = distal tubules

Ureter Arrowhead = blood vessels Arrow = adipose tissue in adventitia

Double nuclei in cell of transitional epithelium

Arrowhead = serosa Arrow = smooth muscle Urinary Bladder Arrowhead = serosa Arrow = smooth muscle

Note highly cellular submucosa

Bladder in relaxed state

Slightly more filled bladder

Arrowhead = lamina propria Arrow = muscularis Urethra Arrowhead = lamina propria Arrow = muscularis

Arrow = transitional epithelium Arrowhead = lamina propria M = muscle

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