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What Is a Memory Cell?

Memory cell is a type of cell that belongs to the immune system. There are two types of memory cells, the memory T cells and the memory B cells. Memory T cells triggers the immune system and attacks disease causing bacteria and viruses. Memory B cells make antibodies which kills bacteria and viruses.

Memory cells or lymphocytes are manufactured in the bone marrow. These memory cells are brought to the different parts of the body in a clear liquid called lymph via the lymphatic system. Among the lymph’s function is to take memory cells or lymphocytes to places where there is infection. When a memory T cell or a memory B cell encounter a specific bacteria or virus, it memorizes that bacteria or virus so that on the next encounter, the memory cell knows what to do. This is why humans are exposed to weakened bacteria and pathogens in the form of vaccines so that the memory cells might be able to learn how to deal with each of those bacteria and pathogens so that next time they will be fully prepared. This is sometimes called building the immune system. Another way for the immune system, represented by the memory cells, to learn about different illnesses is for the person to become exposed to the condition. In some communities it is common practice that when a child gets chicken pox they will allow that child to infect the other children of the community so that after they recover from the chicken pox they will no longer have to fear getting sick from it in the future because their bodies can already recognize how to deal with chicken pox.

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