Urinary system

Urinary System

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

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

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

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

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

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