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The thymus is a small organ, weighing only one ounce, located behind the sternum. It is responsible for training new white blood cells to not attack the body s own cells. However, only two percent of these cells make it through the rigorous training program, with the rest committing suicide to avoid attacking friendly cells.

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Fun Fact:

The thymus is a small organ, weighing only one ounce, located behind the sternum. It is responsible for training new white blood cells to not attack the body’s own cells. However, only two percent of these cells make it through the rigorous training program, with the rest committing suicide to avoid attacking friendly cells.

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