Small round masses of tissue found throughout the human body that fight infections.

Lymph is fluid in which white blood (immune) cells are found. Lymph nodes are small, round masses of tissue that are found in certain areas (such as the neck, groin and armpits). They filter bacteria and other foreign materials out of lymph and expose them to B and T cells and macrophages that can engulf them.

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70 % i think is the answer.