MH 142 Kidney
(Azan)

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Connective Tissue
(Azan)

Connective tissue surrounds , blood vessels and lymphatics. There is less connective in the cortex compared to the medulla.

The tissue section is stained with azan which stains collagen blue.

- thin layer of dense irregular connective tissue.
- connective tissue supports , blood vessels and lymphatics. Macrophages and fibroblasts are prevalent.
- connective tissue supports ducts and tubules forming the . The most prevalent connective tissue cell type is myofibroblasts.
Blood Supply - each kidney is supplied by a renal artery.
- Interlobar Arteries - branches of the renal artery within the renal sinus that enter the renal columns.
- - branches of interlobar arteries that arch over the base of pyramids at the junction of the cortex and medulla.
- Interlobular Arteries - branches of arcuate arteries that transverse the cortex to provide an afferent arteriole for each renal corpuscle.
- Peritubular Capillaries - destination of efferent arterioles of each renal corpuscle depends on its location.
  - Peritubular Plexus - efferent arterioles from cortical glomeruli that remain in the cortex.
  - Medullary Plexus - efferent arterioles from juxtamedullary glomeruli that travel through vasa recta in the medulla.