The renal arteries branch quickly into very small capillaries that make up the glomerulus of the nephron. The blood pressure within the capillaries squeezes liquid into the Bowman's capsule. This process is known as ultra-filtration.
The renal arteries (aa. renales) (Fig. 531), are two large trunks, which arise from the side of the aorta, immediately below the superior mesenteric artery.
MRA is often used to evaluate the arteries of the neck and brain, the thoracic and abdominal aorta, the renal arteries, and the legs (called a "run-off").
blood vessels (veins) carrying blood from the posterior part of the body to the kidneys. Oxygenated blood is carried to the kidneys by the renal arteries
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
 See also: Renal, Arteries, Posterior, Vessels, Kidney
  
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