But that's actually informative Finski! Cool! !
Somebody wrote about "simple" things.Only to be and breath is very complex in creature.
When I first time heard about mitochondria in University, it made me felt fizzy. They are energy units in living creatures, where sugar will be splitted to energy + CO2 + H2O
Wikipedia: A recent study[58] by researchers of the University of Hawaiʻi at Mānoa and the Oregon State University, indicates that the SAR11 clade of bacteria shares a relatively recent common ancestor with the mitochondria existing in most eukaryotic cells.
http://en.wikipedia.org/wiki/Mitochondrion