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O Levels Biology (5090)•5090/12/O/N/23
Question 18 from 5090/12/O/N/23

Explanation

Blood vessels supplying and draining the liver and kidneys

Steps:

  • Recall liver receives blood via hepatic portal vein (nutrient-rich from gut) and drains via hepatic vein to heart.
  • Recall kidney receives oxygenated blood via renal artery and drains filtered blood via renal vein to heart.
  • Examine options for sequence: to liver, from liver, to kidney, from kidney.
  • Select option matching this exact order.

Why C is correct:

  • Hepatic portal vein delivers blood to liver; hepatic vein carries it away; renal artery supplies kidney; renal vein drains it, aligning with circulatory anatomy definitions.

Why the others are wrong:

  • A: Reverses kidney order (from before to).
  • B: Starts with liver drainage (hepatic vein) before supply.
  • D: Lists two supply vessels to liver (hepatic artery and portal vein), omitting proper drainage.

Final answer: C

Topic: Blood vessels

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