Renal pelvis
Renal pelvis | |
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![]() Cross-section of the kidney, with major structures labelled. The renal pelvis, located in the middle of the image, collects urine from the urinary calices, and labelled on the right. | |
![]() An image showing just the pelvis and calices of the kidneys, with the rest of the kidney removed, from a dissected cow and seal specimen. These vary greatly in size and number depending on species.[citation needed] | |
Details | |
Precursor | Ureteric bud |
System | Urinary system |
Identifiers | |
Latin | pelvis renalis |
Anatomical terminology |
The renal pelvis or pelvis of the kidney is the funnel-like dilated part of the ureter in the kidney. In humans, the renal pelvis is the point where the two or three major calyces join together. It has a mucous membrane is covered with transitional epithelium, and an underlying lamina propria of loose to dense connective tissue.
The renal pelvis functions as a funnel for urine flowing to the ureter.
The renal pelvis is the location of several kinds of kidney cancer and is affected by infection in pyelonephritis.[citation needed]
Clinical significance
The renal pelvis is the location of several kinds of kidney cancer and is affected by infection in pyelonephritis.[citation needed] A large "staghorn" kidney stone may block all or part of the renal pelvis.
The size of the renal pelvis plays a major role in the grading of hydronephrosis. Normally, the anteroposterior diameter of the renal pelvis is less than 4 mm in fetuses up to 32 weeks of gestational age and 7 mm afterwards.[1] In adults, 13% of the normal population have a transverse pelvic diameter of over 10 mm.[2]
Etymology and pronunciation
Like the bony pelvis, the renal pelvis (/ˈriːnəl
Additional images
Depiction of the developing renal pelvis.
Renal pelvis in a cadaveric specimen.
See also
- Renal sinus
- Pyelectasis, the dilation of the renal pelvis
References
- ↑ Page 189 in: Lua error in Module:Citation/CS1 at line 886: bad argument #1 to 'sub' (string expected, got table).
- ↑ "Sonographic evaluation of renal appearance in 665 adult volunteers. Correlation with age and obesity". Acta Radiol 34 (5): 482–5. 1993. doi:10.3109/02841859309175388. PMID 8369185.
- ↑ Merriam-Webster, Merriam-Webster's Unabridged Dictionary, Merriam-Webster, http://unabridged.merriam-webster.com/unabridged/.
External links
- Anatomy figure: 40:03-07 at Human Anatomy Online, SUNY Downstate Medical Center—"Section of the kidney, anterior view."
- Anatomy image:8962 at the SUNY Downstate Medical Center
- Anatomy photo: Urinary/mammal/pelvis0/pelvis1 - Comparative Organology at University of California, Davis—"Mammal, renal pelvis (Gross, Medium)"
- Anatomy photo: Urinary/mammal/pelvis1/pelvis1 - Comparative Organology at University of California, Davis—"Mammal, renal pelvis (LM, Medium)"