General Biology I

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Segmental arteries

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General Biology I

Definition

Segmental arteries are branches of the renal artery that supply blood to different segments of the kidney. They play a critical role in delivering oxygenated blood required for kidney function and filtration processes.

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5 Must Know Facts For Your Next Test

  1. Segmental arteries arise from the renal artery, which is a direct branch of the abdominal aorta.
  2. There are typically five segmental arteries in each kidney, named after the regions they supply: superior, anterior superior, anterior inferior, inferior, and posterior.
  3. These arteries further divide into interlobar arteries as they penetrate deeper into the kidney tissue.
  4. Obstruction or damage to segmental arteries can significantly impair kidney function due to reduced blood flow.
  5. Each segmental artery supplies an independent vascular segment of the kidney, which is important for surgical procedures such as partial nephrectomy.

Review Questions

  • What primary artery do segmental arteries branch from?
  • How many segmental arteries are typically found in each kidney?
  • Why is it significant that each segmental artery supplies an independent vascular segment?

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