STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Sarcoma cell. Coloured transmission electron micrograph of a sarcoma cell. Sarcomas are malignant (cancerous) tumours in the body's connective tissues. Connective tissues include muscles, blood vessels, nerves and fat. This cell has the typical morphology of a cancer cell. The nucleus (brown) has become enlarged and multilobed and the cell wall is rippled. There are a large number of highly active mitochondria (black dots) in the cell's cytoplasm (pink), and a large proportion of endoplasmic reticulum (ER, black strands). Mitochondria provide the cell with energy, while ER manufactures and modifies proteins. Magnification: x12,000 when printed 10 centimetres wide.
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