Which pairing correctly matches the organ to its described function?

• A. Heart — Works with lungs to pump blood and oxygen throughout the body
• B. Liver — Secretes insulin to break down sugars and starches
• C. Kidneys — Break down protein, filter toxins and poisons, and form urine wastes
• D. Pancreas — Yellow colored skin and eyes

Answer: (A)

Understanding how organs contribute to circulation and gas exchange is being tested here. The heart’s job is to pump blood, and the lungs oxygenate that blood. Blood travels from the body to the heart, then to the lungs to pick up oxygen, returns to the heart, and is pumped out to the rest of the body. This coordinated heart–lung function keeps oxygen-rich blood flowing to tissues.

The other pairings don’t fit because they mix up primary roles: the liver does not secrete insulin—that’s produced by the pancreas—while the liver handles metabolism and bile production. The kidneys mainly filter the blood to remove wastes and form urine; they don’t break down proteins as a primary function. The pancreas does secrete insulin and digestive enzymes, but “yellow colored skin and eyes” describes jaundice linked to liver or bile ducts, not pancreatic function.