LOUISE HUGHES / SCIENCE PHOTO LIBRARY LOUISE HUGHES / SCIENCE PHOTO LIBRARY
Cytoskeleton in unicellular parasite, coloured scanning electron micrograph (SEM). All cells have a support and transport network called the cytoskeleton. In the single-celled parasite shown here, Trypanosoma brucei (the causative agent of African trypanosomiasis or sleeping sickness), most of the cytoskeleton runs beneath the cell membrane, forming a strong and flexible microtubule corset. The bulge within the cell is the remains of the nucleus and the pink structure running the length of the cell is the flagellum, the motile mechanism of the cell. Magnification: x5500 when printed at 10 centimetres across.
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