Which organ is primarily responsible for filtering blood and forming urine?

Which organ is primarily responsible for filtering blood and forming urine?

• A. Liver
• B. Lungs
• C. Pancreas
• D. The kidneys

Answer: (D)

The kidneys are the organs that filter blood and form urine. Blood is filtered through the glomerulus into tubules called nephrons, where the filtrate is refined through reabsorption and secretion to become urine. This not only removes waste products like urea and creatinine but also strictly regulates fluid volume, electrolyte balance, and acid-base status, while also producing hormones such as erythropoietin and renin. Other organs have different roles: the liver processes nutrients and detoxifies substances, the lungs handle gas exchange, and the pancreas manages digestion and blood sugar. So the kidney’s filtration and urine formation is the primary function that addresses the question.

The kidneys are the organs that filter blood and form urine. Blood is filtered through the glomerulus into tubules called nephrons, where the filtrate is refined through reabsorption and secretion to become urine. This not only removes waste products like urea and creatinine but also strictly regulates fluid volume, electrolyte balance, and acid-base status, while also producing hormones such as erythropoietin and renin. Other organs have different roles: the liver processes nutrients and detoxifies substances, the lungs handle gas exchange, and the pancreas manages digestion and blood sugar. So the kidney’s filtration and urine formation is the primary function that addresses the question.