Peritubular capillaries

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Artery: Peritubular capillaries
Source	Efferent arteriole
Branches	Interlobular vein
Dorlands / Elsevier	c_06/13477736

In the renal system, peritubular capillaries are tiny blood vessels that travel alongside nephrons allowing reabsorption and secretion between blood and the inner lumen of the nephron.

Ions and minerals that need to be saved in the body are reabsorbed into the peritubular capillaries through active transport, secondary active transport, or transcytosis.

The ions that need to be excreted as waste are secreted from the capillaries into the nephron to be sent towards the bladder and out of the body.

The majority of exchange through the peritubular capillaries occurs because of chemical gradients, osmosis and Na+ pumps.

[edit] External links

• Histology at BU 16016loa
• Physiology at MCG 7/7ch03/7ch03p10 - "Renal Vasculature: Efferent Arterioles & Peritubular Capillaries"
• Organology at UC Davis Urinary/mammal/vasc0/vasc4 - "Mammal, renal vasculature (EM, Low)"

v • d • e Urinary system – Kidney Layers Renal fascia • Renal capsule • Renal cortex  (Renal column) • Renal medulla (Renal sinus, Renal pyramids, medullary interstitium) • Renal lobe • Cortical lobule • Medullary ray • Nephron Afferent circulation Renal artery → Segmental arteries → Interlobar arteries → Arcuate arteries → Cortical radial arteries → Afferent arterioles → Renal corpuscle (Glomerulus, Bowman's capsule) Renal tubule Proximal tubule → Loop of Henle (Descending, Thin ascending, Thick ascending) → Distal convoluted tubule → Connecting tubule → Collecting ducts → Duct of Bellini → Renal papilla → Minor calyx → Major calyx → Renal pelvis → Ureter Efferent circulation Glomerulus → Efferent arterioles → Peritubular capillaries / Vasa recta → Arcuate vein → Interlobar veins → Renal vein Juxtaglomerular apparatus Macula densa • Juxtaglomerular cells • Extraglomerular mesangial cell Filtration Glomerular basement membrane • Podocyte • Filtration slits • Intraglomerular mesangial cell • Tubular fluid Renal physiology Acid base physiology • Fluid balance