<prompt> Diapedesis isImmigration of leukocytes through the basement membraneImmigration of leukocytes through the endothelial gap to the site of inflammationAggregation of platelets at the site of inflammationAuto-digestion of the cells  <response>: Diapedesis is immigration of leukocytes through the endothelial gap to the site of inflammation.It occurs mainly in postcapillary venules except in lung where it occurs in capillaries.Robbins 9th edition p 76 