| http://www.w3.org/ns/prov#value | - They are released by certain leukocytes. ??? ??? ??? Histamine A substance released B injured cells that causes blood vessels to dilate during an inflammatory response. ??? ??? ??? Basophils A circulating leukocyte that produces histamine. ??? ??? ??? Mast Cells A vertebrate body cell that produces histamine and other molecules that trigger the inflammatory response. ??? ??? ??? Inflammatory Respo
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