Self-replicating organelles found in cytoplasm bound by two membranes, the inner one folded into the interior as a series of projections; they are the principal sites of energy generation resulting from the oxidation of food, and contain the enzymes of the Krebs and fatty acid cycles and the respiratory pathway; they contain DNA and RNA for independent replication.

Small structures in a cell that are found in the cytoplasm (fluid that surrounds the cell nucleus). Mitochondria make most of the energy for the cell and have their own genetic material that is different from the genetic material found in the nucleus. Many diseases are caused by mutations (changes) in the DNA of mitochondria. Mitochondria are cell organelles.

Small structures within cells that create break down nutrients and create energy for cells. Known as the power producers or energy factories of cells.

(mitochondrion) A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration.

(mitochondrion) Membranous cytoplasmic organelle the interior of which is subdivided by cristae.

(mitochondrion) Semiautonomous, self-reproducing organelles that occur in the cytoplasm of all cells of most, but not all, eukaryotes. Mitochondria contain distinctive ribosomes, transfer RNAs, amino acyl t-RNA synthetases, and elongation and termination factors. Mitochondria depend upon genes within the nucleus for many essential messenger RNAs. Mitochondria consist of two sets of membranes, a smooth continuous outer coat and an inner membrane arranged in tubules or more often in folds that form platelike double membranes (cristae). Mitochondria are the principal energy source of the cell and contains the cytochrome enzymes of terminal electron transport and the enzymes of the citric acid cycle, fatty acid oxidation, and oxidative phosphorylation. Mitochondria are the sites of the reactions of oxidative phosphorylation, which result in the formation of ATP.