(2)-----releasing leukocytes from bone marrow by IL-1 and TNF immature neutrophils(rod nucleus) increased in peripheral blood(left divert) Depending on the duration inflammation is divided into acute and chronic inflammation(2) ------releasing leukocytes from bone marrow by IL-1 and TNF, immature neutrophils (rod nucleus) increased in peripheral blood (left divert). Depending on the duration , inflammation is divided into acute and chronic inflammation