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Spleen, an organ of the lymphatic system is located in the left side of the abdominal cavity under the diaphragm, the muscular partition between the abdomen and the chest.

1. Spleen is called the graveyard of RBC because it removes old and dead cells.
2. Spleen is located in the thoracic cavity.
3. Spleen is a part of the circulatory system.
4. Spleen is involved in the production of RBCs.

Correct answer: Spleen is called the graveyard of RBC because it removes old and dead cells.

Solution

The spleen filters blood and breaks down old or damaged red blood cells, which is why it is often called the “graveyard of RBCs.” This matches the correct option exactly.

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