Category A - full version without watermark 1024x576 (check terms and conditions at www.teledesign.de) The version with watermark is for free to embed . Description: : Apoptosis is the process of programmed cell death. Cell death is a completely normal process in living organisms. The "decision" for apoptosis can come from the cell itself, from the surrounding tissue, for example, the differentiation of fingers and toes in a developing human embryo occurs because cells between the fingers apoptose; the result is that the digits are separate. The decision cal also come from a cell that is part of the immune system. In these cases apoptosis functions to remove the damaged cell or halting further spread of viral infection