The renal arteries normally arise off the side of abdominal aorta which is situated immediately below the superior mesenteric artery and supply blood to the kidneys. Each renal artery is directed across the crus of the diaphragm almost forming a right angle with the aorta. A large portion of the blood flow to the kidneys is provided by the renal arteries. The renal arteries can pass through a third of the total cardiac output to be filtered by the kidneys. The kidneys have a variable arterial and there can be one or more renal arteries supplying each kidney. They are located above the renal vein. A common renovascular anamoly is teo or more arteries to a single kidney (Supernumerary renal arteries) with an occurrence ranging from 25% to 40% of kidneys. A renal artery has a radius of 0.25 cm (approximately) and 0.26 at the root.
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Last date updated on April, 2021