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Sperm tails, TEM

Sperm tails, TEM

P624/0165

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Credit

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

Caption

Sperm tails. Coloured transmission electron micrograph (TEM) of cross sections through sperm tails. A sperm's tail's ability to move is partly due to the arrangement of microtubules (part of the cell's cytoskeleton, white rings) within the tail. The microtubules are arranged in a central axoneme with two central single microtubules and nine peripheral double microtubules. Surrounding the microtubules are dense fibres (white, solid), which provide rigidity and protection to the tail. Next is a layer of mitochondria (pink) which provide the energy for movement. Finally the tail is wrapped in a protective outer sheath (red). Magnification: x20,000 when printed 10 centimetres wide.

Release details

Model release not required. Property release not required.

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