what is immune system
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The immune system is a network of cells, tissues, and organs that work together to defend the body against attacks by “foreign” invaders.
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The immune system is made up of a network of cells, tissues, and organs that work together to protect the body.
One of the important cells involved are white blood cells, also called leukocytes, which come in two basic types that combine to seek out and destroy disease-causing organisms or substances.
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