Caption: Mitochondrion from a heart muscle cell showing numerous cristae. The mitochondrion is a membrane-enclosed organelle, found in most eukaryotic cells. Mitochondria are sometimes described as the "power plants" of the cell because they convert NADH and NADPH into energy in the form of ATP through the process of oxidative phosphorylation. A typical eukaryotic cell contains about 2,000 mitochondria. Mitochondria contain DNA that is independent of the DNA located in the cell nucleus. According to the endosymbiotic theory, mitochondria are descended from free-living prokaryotes.
Magnification*: x25,460
Type: TEM
Copyright 1996 Dennis Kunkel Microscopy, Inc.
Keywords: cardiac,cell,cristae,heart,mitochondria,mitochondrion,muscle,TEM,cardiac muscle,heart muscle,muscle cell,heart muscle cell,03.01.07a,cell organelle,eukaryote,eukaryote cell organelle,organelle,organelles,cell power plant,power plant,respiration,adenosine triphosphate,ATP,NADH,oxidative phosphorylation,NADPH,DNA,mitochondrial,mitochondrial DNA,11465C