| http://www.w3.org/ns/prov#value | - rtain cells that initiate, inhibit, increase, or decrease activity in other cells; important chemical communicators in the immune response, regulating many activities associated with immunity and inflammation ??? ??? ??? extracellular fluid all body fluids found outside cells, including interstitial fluid, plasma, lymph, and cerebrospinal fluid; provides a stable internal environment for body cell
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