Suicide is cellular.

Apoptosis is a death program contained within a cell. Unlike necrosis, which usually entails cellular trauma or injury, which can harm the multicellular organisms, apoptosis benefits the very same. Lacking immune systems, for instance, plant apoptosis removes cells toward regeneration of the organism. Even with an immune system, apoptosis occurs in the human body. Fifty to 70 billion cells self-destruct each day.

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