Factors Affecting the Immune System (237 words, 2 pages)
The immune system is a group of cells and organsthat defend the body against invaders causingdisease. The immune system is made up of mostlywhite blood cells and their contact with lymphnodes, spleen, tonsils, intestines, and lungs. Theimmune system rejects and attacks any substancesnot normally present within the humans body.Innate, or ...
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