Renal pyramids

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Renal pyramids
1. Renal pyramid
2. Efferent artery
3. Renal artery
4. Renal vein
5. Renal hilum
6. Renal pelvis
7. Ureter
8. Minor calyx
9. Renal capsule
10. Inferior renal capsule
11. Superior renal capsule
12. Afferent vein
13. Nephron
14. Minor calyx
15. Major calyx
16. Renal papilla
17. Renal column
Vertical section of kidney.
Latin pyramides renales
Gray's subject #253 1221
Dorlands/Elsevier p_03/13479070

Renal pyramids (or malpighian pyramids) are cone-shaped tissues of the kidney. The renal medulla is made up of 8 to 18 of these conical subdivisions. The broad base of each pyramid faces the renal cortex, and its apex, or papilla, points internally. The pyramids appear striped because they are formed by straight parallel segments of nephrons.

Frontal section through the kidney

The base of each pyramid originates at the corticomedullary border and the apex terminates in a papilla, which lies within a minor calyx.

v • d • e
Urinary system - Kidney
Layers Renal fascia • Renal capsule • Renal cortex  (Renal column) • Renal medulla (Renal sinus, Renal pyramids) • 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
 This anatomy article is a stub. You can help Wikipedia by expanding it.
Retrieved from "http://en.wikipedia.org/wiki/Renal_pyramids"
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