A diagram showing a mitochondrion of the eukar...

A diagram showing a mitochondrion of the eukaryotic cell. Mitochondria are organelles surrounded by membranes, distributed in the cytosol of most eukaryotic cells. Its main function is the conversion of potential energy of pyruvate molecules into ATP. (Photo credit: Wikipedia)

Science Daily says the mitochondria in each cell’s nucleus may signal death to all cells in the body. The mitochondria send out a protein to tell the cell and neighboring cells to die. This protein is a form of messenger epigenetics that sends signals to cells to do something. The body, under certain circumstances may issue a death signal to kill all cells quickly. This may be why people on their death beds suddenly just go.