Section 1.Programmed Cell Death Concept:PCD is the death of a cell in any form, mediated by an intracellular program.PCD is carried out in a regulated process,which usually confers advantage during an organism's life-cycle.PCD serves fundamental functions during both plant and multicellular animal tissue development. Three mechanism of PCD in mammalian cells: Apoptosis Necroptosis(programmed necrosis) Autophagy https://en.wikipedia.org/wiki/Programmed_cell_death2 This document is produced by trial version of Print2Flash.Visit www.print2flash.com for more information