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F. colour SEM of sperm being capacitated in uterus

F. colour SEM of sperm being capacitated in uterus

P624/0068

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Credit

PROFESSORS P.M. MOTTA & J. VAN BLERKOM / SCIENCE PHOTO LIBRARY PROFESSORS P.M. MOTTA & J. VAN BLERKOM / SCIENCE PHOTO LIBRARY

Caption

Capacitation of spermatozoa. False-colour scanning electron micrograph of a spermatozoon floating over the endometrium, the internal wall of the uterus. Thanks to their movements through the ciliated epithelium (light orange) spermatozoa undergo a process known as capacitation. During this phase, which lasts about seven hours, a glycoprotein coat and seminal plasma proteins are removed from the heads of spermatozoa. This enables a spermatozoon, when close to the egg, to release special enzymes which allows it to penetrate the surrounding membranes of the egg. Magnification: x5060 at 6x7cm size.

Release details

Model release not required. Property release not required.

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