Provides blood flow to the kidneys

2021-04-30 09:08 PM

Renal circulation is unique in that there are two beds of capillaries, glomerular and peritoneal capillaries, arranged in series and separated by arterioles.

Normal blood flow to the two kidneys is about 22 percent of cardiac output or 1100 ml/min. The renal artery enters the kidney through the navel and then branches gradually to form the inter-artery, the artery, the globular artery (also called the radial artery) and the radial arterioles, leading to glomerular capillaries, which contain large amounts of fluids and solutes (except for plasma proteins), are filtered to initiate urine formation. The distal ends of the capillaries of each glomerulus bind together to form arterioles, resulting in a second network of capillaries, the peritoneal capillaries, that surround the renal tubules.

Figure. The main vessels provide blood flow to the kidneys and the microcirculation pattern of each nephron.

Renal circulation is unique in that there are two beds of capillaries, glomerular and peritoneal capillaries, arranged in series and separated by arterioles. These arterioles help regulate hydrostatic pressure in both sets of capillaries. The high hydrostatic pressure in the glomerular capillary (about 60 mm Hg) causes rapid filtration, while the much lower hydrostatic pressure in the peritoneal capillaries (about 13 mm Hg) allows reabsorption. liquid quickly. By modulating the resistance of the radial and output arterioles, the kidneys are able to regulate hydrostatic pressure in both the glomerular and peritoneal capillaries, thereby varying the rate of glomerular filtration, reabsorption. in the renal tubules, or both to meet the body's homeostasis.

The peritoneal capillaries pour into the vessels of the venous system, which run parallel to the arterioles.

The blood vessels of the venous system gradually form streptococcal, arc, inter-vein, and renal veins, which leave the kidney next to the renal artery and ureter.



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