Q: Which organ receives only oxygenated blood?

A Lungs
B Gills
C Liver
D Spleen

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Answer: D

Explanation:

The spleen is an organ that only receives oxygenated blood. It is a small, fist-shaped organ located in the left upper quadrant of the abdomen. The spleen plays an important role in the immune system by filtering out old or damaged red blood cells and producing white blood cells to fight infection. The oxygenated blood supply to the spleen comes from the splenic artery, which branches off from the celiac artery, a major blood vessel that supplies blood to the abdominal organs. Options A and B are incorrect because both the lungs and gills are involved in the exchange of gases between the respiratory surface and the bloodstream, and thus receive both oxygenated and deoxygenated blood. Option C is incorrect because the liver receives both oxygenated and deoxygenated blood from the hepatic artery and hepatic portal vein, respectively.

Q: Which organ receives only oxygenated blood?

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