BIOL SCI 217 Chapter Notes - Chapter 15, 24: Histocompatibility, Cd74, Collagen
8 Jan 2016
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The immune system is comprised of the lymphoid tissues, the immune cells, and chemicals (intracellular/secreted) that coordinate and execute immune functions. The key features of the immune system are specificity and memory, and they allows the immune system to accomplish three major functions. Highly dependent on cell to cell communication: it recognizes and removes abnormal self cells that occur when development. Cytokines are protein messengers released by one cell that affect the growth/activity of another cell, and antibodies are proteins secreted by certain immune cells that bind antigens and make them more visible to the immune system. The human immune response is typically divided into two categories. Innate immunity is present from birth and is the body"s nonspecific response to invasion as the body"s general response, it targets a wide variety of invaders and do not develop over time. Because it doesn"t target specific pathogens, its starts within minutes to.
