O Levels Biology (5090)•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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