A 39-year-old member asked:
What makes up the immune system?
1 doctor answer • 2 doctors weighed in
Dr. Rick Kirschneranswered
42 years experience
Cells,tissues,organs: The immune system is a network of cells, tissues, and organs that work together to defend the body against attacks. Lymphoid organs (produce white blood cells that fight invading organisms) found throughout body, in bone marrow, thymus gland, lymph nodes, tonsils, appendix, lining of digestive tract and lungs.
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5.8k viewsReviewed >2 years ago
Last updated Apr 16, 2015
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