Immune System - The Body's Frontline of Defense
The human immune system is the body's fundamental nerve center of defense. It also keeps a close protective watch over the activities and conditions of the body's organ systems at the cellular level. It is a system constituted by organ structures and the integrative biological mechanisms that they employ in order to identify external stimuli and prevent lifetime-threatening pathogens, infected cells, or tumors from harming the body. More information: click here
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