Which organ is responsible for filtering blood and producing urine?

• A. Liver
• B. Heart
• C. Kidney
• D. Lungs

Answer: (C)

The kidney is the organ responsible for filtering blood and producing urine. It plays a crucial role in the urinary system by removing waste products and excess substances from the bloodstream, which are then excreted as urine.

The kidneys regulate various bodily functions, including fluid balance, electrolyte levels, and blood pressure. They contain functional units called nephrons, which filter blood, reabsorb essential nutrients, and excrete waste. This process helps maintain homeostasis within the body, ensuring that the internal environment remains stable despite external changes.

While the liver is involved in detoxifying substances and metabolizing nutrients, it does not directly filter blood or produce urine. The heart's primary function is to pump blood throughout the body, and the lungs are involved in gas exchange, specifically oxygen and carbon dioxide. Each of these organs has distinct roles, but only the kidneys are directly tasked with producing urine from filtered blood.