STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Tumour. Coloured transmission electron micrograph (TEM) of a capillary (yellow and red outline) running through a sarcoma. An erythrocyte (red blood cell) is seen in the capillary. There are structural abnormalities in the basement membrane (brown) of the blood vessel, a characteristic of cancer. Sarcomas are malignant (cancerous) tumours in the body's connective tissues. Connective tissues include muscles, blood vessels, nerves and fat. Cancerous cells promote the formation of new blood vessels within tumours, to provide the fast growing cells with oxygen. Magnification: x4000 when printed at 10 centimetres wide.
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