Urinary System 

The picture " " can link to it's
corresponding histological
photograph

The picture " " can link to it's
corresponding histological drawing.




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Kidney


NA-1-g, middle part
NP-1-a, human
NP-1-b, human, Azan stain

   Cortex


Capsule

Parenchyma

»»  Cortical labyrinths
»»  Renal corpuscles
     Bowman's capsule
         -simple squamous epi. (parietal layer)
     Urinary space
     Glomerulus (with visceral layer of Bowman's capsule)
         - a tuft of capillaries 

Convoluted tubules

»»  Proximal convoluted tubules (cs)
     Cell boundaries - indistinct
     Cytoplasm - pale staining
     Lumen with brush border
»»  Distal convoluted tubules (cs)
     Cell boundaries - distinct
     Cytoplasm - pale staining
     Lumen - wider than those of proximal tubule, 
         without brush border
     Macula densa ( of Juxta-glomerular apparatus)

Lacis Cells

Medullary rays ( Pars radiata )

»»  Proximal tubules (ls)
»»  Distal tubules (ls)
»»  Collecting tubules (ducts)(ls)
     Cell boundaries - prominent
     Cytoplasm - pale staining
     Lumen - wider than those of distal tubules

Blood vessels

»»  Arcuate and interlobular artery and vein; 
     afferent (Juxtaglomerular cells) and efferent arterioles

   Medulla


»»  Proximal straight tubules
»»  Thick & thin segments of Henle's loop (low cuboidal ;simple squamous)
»»  Collecting tubules ( Simple cuboidal epi. )
»»  Papillary ducts ( Simple columnar epi. )
»»  Capillaries

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Ureter


 ( NP-4-C )


Mucosa

»»  Epithelium - transitional
»»  Lamina propria: C.T.
»»  Muscularis
»»  Smooth muscle
     Inner & outer longitudinal
     Middle circular

Adventitia

»»  loose connective tissue
»»  blood vessels

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Urinary bladder


( NP-5-b, human )

*No submucosa, no muscularis mucosa or partly lacking found in urinary bladder.

Mucosa

»»  Epithelium-transitional
»»  Lamina propria: C.T.

Muscularis, smooth muscle

»»  Inner & outer longitudinal
»»  Middle circular

Adventitia - partly lacking

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Urethra


NP-6-a, prostatic urethra, HE
NP-6-b

* please refer to male reproductive system

Mucosa

»»  Epithelium-transitional
     (but not in membranous cavernous portion)
»»  Thin basement membrane
»»  Lamina propria
     - rich in elastic fibers and blood vessels
»»  Muscularis
     - longitudinal and circular disposed surrounded by
     the fibromuscular tissue of the prostate gland
»»  Submucosa cannot be distinguished
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