False-colour SEM of sperm over uterine epithelium

False-colour SEM of sperm over uterine epithelium

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This image is part of the feature Motta: Reproduction

Credit: PROF. P. MOTTA/DEPT. OF ANATOMY/UNIVERSITY "LA SAPIENZA", ROME/SCIENCE PHOTO LIBRARY

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Caption: Spermatozoa in the uterus. False-colour scanning electron micrograph of a group of spermatozoa (yellow) floating over the internal wall of the uterus. Movements of sperm through the ciliated epithelium (green) cause 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: x2595 at 6x7cm size. Magnification: x4080 at 4x5 inch size.

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Keywords: anatomy, capacitation, capacitation of sperm, endometrium, false-coloured, human body, in uterus, reproduction, reproductive system, sperm, sperm in uterus, spermatozoa, uterus

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