Cell mitochondrion

Cell mitochondrion

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Credit: K.R. PORTER/SCIENCE PHOTO LIBRARY

Caption: Mitochondrion. Coloured Transmission Electron Micrograph (TEM) of a single mitochondrion in a human pancreas cell. The cylindrical mitochondrion (blue) has two membranes: an outer surrounding membrane; an inner membrane which forms folds called cristae. It is on the cristae that chemical reactions occur. Mitochondria are sites of cell respiration: sugars and fats are oxidised to produce energy which is then stored. They are thus called "powerhouses" of the cell. In the cytoplasm can be seen rough endoplasmic reticulum (ER) at lower left. The elongated membranes of ER store and transport cell products. Ribosomes (dots) on the rough ER are sites of protein synthesis. Magnification in the region of x64,000 when printed 10cm wide.

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Keywords: biological, biology, cell, cell structure, cytology, endoplasmic reticulum, histology, human, human cell, images, magnified image, microbiology, micrograph, microscopic photos, mitochondria, mitochondrion, organelle, pancreas, ribosome, rough, subjects, tem, transmission electron

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