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Inside Information

(Photograph) - Above: red blood cells travelling from a large vessel into a small capillary. They travel nine miles a day, carrying oxygen to tissues. Right:a cultured white blood cell (blue) engulfing a yeast cell (green). Eventually it will swallow and digest it, as part of its role in combating infection by consuming foreign invaders or attacking them with enzymes. Both pictures are coloured scanning electron micrographs, from a collection of stunning images of the human body in Inside Information by William A Ewing, Pounds 12.95, Thames and Hudson

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