Tonsils are a pair of tissues rich in lymphocytes (immune system cells). And together they form one of the immune system’s first defense against infections.
The thymus controls the development of T lymphocytes (immune system cells). T lymphocytes are essential for protection against infections.
You'll find them in several places, including your neck, armpits, and groin. Rich in B and T lymphocytes (immune system cells), lymph nodes contain lymphocytes that kill germs and pathogens that can make you sick.
The spleen contains white blood cells (immune system cells) that fight infection and disease. The spleen also functions as a filter, and destroys old and damaged blood cells.
The liver is important in immune function. As blood passes through the liver, phagocytes (immune system cells) ingest bacteria, dead or dying cells, and harmful foreign particles.
Bone marrow is the soft tissue located in the hollow centers of most bones. Healthy bone marrow contains stem cells that continuously produce red blood cells, white blood cells and platelets.
The circulatory system that carries cells and proteins of the immune system from one part of the body to another.
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