STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Muscle blood supply. Coloured light micrograph of a section through a muscle bundle, showing blood vessels (turquoise). These vessels supply the muscle cells with oxygen and carry waste material, such as carbon dioxide, away from the cells, enabling them to function efficiently. The vessels have been injected with a dye to highlight them. Magnification: x800 when printed 10cm wide.
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