Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Paul M. Heidger,
Peer Review Status: Externally Peer Reviewed
Rhesus monkey, 10% formalin, H. & E., 50 x.
In this plate, the various constituents of kidney cortex are shown. The cortex is composed of radiating columns of straight renal tubules (medullary rays), alternating with regions containing glomeruli and convoluted renal tubules (cortical labyrinth). Other names for these two divisions are pars radiata or the processes of Ferrein* for the medullary rays, and the pars convoluta for the cortical labyrinth. The cortical labyrinths contain glomeruli, proximal and distal convoluted tubules, and the arched collecting tubules. The medullary rays contain the straight portions of proximal tubules (medullary segments), the thick segments of ascending arms of Henle's* loops, and the straight collecting tubules.
* Ferrein was a seventeenth -century French anatomist and Henle was a nineteenth-century German anatomist.
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