Mitochondria. Coloured transmission electron micrograph of mitochondria (blue) in a liver cell. Also visible are glycogen granules (black) and fat droplets (red). The mitochondria have been sectioned, revealing their numerous internal membranes, or cristae, where respiration takes place. Mitochondria provide cells with energy by oxidising carbohydrates and fat. They are found in almost all cells, have their own genetic material and replicate autonomously. One of the functions of the liver is to act as a temporary store for carbohydrates (which it converts into glycogen) and fat from digested food. Magnification x8550 at 6x5,5cm size.
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