Question

Loop of Henle is found in

• A. Spleen
• B. Lung
• C. Kidney
• D. Gall bladder

Hint:

The loop of Henle is located in the kidney and plays a crucial role in urine concentration.

Answer 1

The Correct Option is C

The Loop of Henle is part of the nephron, so we just need to identify which organ contains nephrons.

1. Spleen: Filters blood cells, not urine, no nephrons.
2. Lung: Performs gas exchange, no nephrons.
3. Kidney: Correct - contains nephrons, and the Loop of Henle is a key segment of each nephron.
4. Gall bladder: Stores bile, no nephrons.

So the correct answer is Kidney.

Answer 2

A different way to reach the same conclusion is to think about the anatomical location and embryological origin of the organs listed, since the Loop of Henle is specifically part of the urinary system's excretory tubule network.

1. Spleen: Develops from mesenchymal tissue associated with the lymphatic/immune system, entirely separate from the excretory tubules of the urinary system.
2. Lung: Develops from the respiratory diverticulum of the embryonic foregut, structurally and developmentally unrelated to kidney tubules.
3. Kidney: Develops from the metanephric mesoderm, which specifically forms the nephrons, including the tubular loop that dips into the renal medulla and back, this is the Loop of Henle, located only within kidney tissue.
4. Gall bladder: Develops from the embryonic hepatic diverticulum, associated with the digestive/biliary system, not the urinary system.

Tracing the developmental origin of each organ leads to the same one associated with the urinary system.

Hence, the correct answer is Kidney.