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Red blood cells

Red blood cells

P242/0351

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Credit

STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY

Caption

Red blood cells. Coloured scanning electron micro- graph of red blood cells in 'rouleau' formation. They often stack together in this way because of their shape. Red blood cells are the most abundant type of cell in human blood, accounting for 40% of blood volume. Each cubic millimetre of blood contains around five million of these tiny, flexible disc-shaped cells. The red colour comes from the protein haemoglobin, which picks up oxygen in the lungs and distributes it around the body. Because the cells have no nucleus and are subjected to constant physical pounding, they last only four months, before being destroyed & broken down. Magnification: x4000 when printed 10cm wide.

Release details

Model release not required. Property release not required.

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