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The juxtamedullary nephrons comprise only about 15% of the nephrons in the human kidney. [ 1 ] : 24 However, it is this type of nephron which is most often depicted in illustrations of nephrons. In humans, cortical nephrons have their renal corpuscles in the outer two thirds of the cortex, whereas juxtamedullary nephrons have their corpuscles ...
Connecting tubules from several adjacent nephrons merge to form cortical collecting tubules, and these may join to form cortical collecting ducts (CCD). [1] Connecting tubules of some juxtamedullary nephrons may arch upward, forming an arcade. It is this "arcuate" feature which gives the tubule its alternate name.
According to the length of the loop of Henle, nephrons are classified into nephrons with a long loop and with a short loop of Henle. [24] Although those two classifications do not coincide. Usually, juxtamedullary nephrons have long loops of Henle, but there are more long-looped nephrons than juxtamedullary nephrons in the kidneys. [71]
Cortical nephrons near the corticomedullary junction (15% of all nephrons) are called juxtamedullary nephrons. The blood exiting the efferent arterioles of these nephrons enter the vasa recta , which are straight capillary branches that deliver blood to the renal medulla .
For cortical nephrons, a single network of capillaries, known as the peritubular capillaries, surrounds the entire renal tubule, whereas for juxtamedullary nephrons, the peritubular capillaries surround only the proximal and distal convoluted tubules, while another network branching from the efferent arteriole, known as the straight arterioles ...
The renal cortex is the outer portion of the kidney between the renal capsule and the renal medulla. [1] In the adult, it forms a continuous smooth outer zone with a number of projections (cortical columns) that extend down between the pyramids.
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Cortical thick ascending limb; The cortical thick ascending limb drains urine into the distal convoluted tubule. [3] The tissue type of the loop is simple squamous epithelium. The "thick" and "thin" terminology does not refer to the size of the lumen, but to the size of the epithelial cells. [4] The loop is also sometimes called the nephron loop.