Renal medulla
From WikiLectures
Anatomy[edit | edit source]
The medulla of the kidney is darker, striated and sometimes reaches the hilum. It is stored under the outer layer of the bark.
- pars radiata corticis - narrow strips of marrow extending deep into the cortex
- is arranged in pyramidal (triangular in cross section) formations – pyramides renales, the base of each pyramid is turned towards the surface of the kidney and the top of the pyramid - papilla renalis is turned towards the hilum and penetrated by openings (area cribrosa) - foramina papillaria, which represent the mouths of drainage ducts - ductus papillares
The boundary between the bark and the pith is not straight.
Histological image[edit | edit source]
- Loop of Henle
- thin arm – single-layer flat epithelium, very thin wall, small lumen
- thick shoulder – single-layer cubic epithelium, round, oval, regular lumen
- collecting ducts - single-layer cubic epithelium, but the lumen is not so regular, there are visible boundaries between individual cells
- other visible structures of the marrow: capillaries, arteries, veins, unmyelinated vegetative nerves,...
Links[edit | edit source]
Related Articles[edit | edit source]
References[edit | edit source]
- ČIHÁK, Radomír. Anatomy 1. 2. edition. Grada Publishing, a.s., 2008. 516 pp. vol. 1. ISBN 80-7169-970-5.
