False-colour TEM of an ovum during fertilisation

Bildnummer 11874338
False-colour TEM of an ovum during fertilisation
False-colour transmission electron micrograph (TEM) showing penetration of an ovum by a single human spermatozoon,prior to fertilisation. Most of the sperm is located in a space between the oocyte and the upper zona pellucida and appears positioned alongside the oocyte rather than if it were about to penetrate head-first. This is due to the location of immunological recognition & attachment sites on the side of the sperm's head. Following the successful penetration of the oocyte by a single sperm,rapid chemical changes in the membrane surrounding the oocyte cause it to thicken and prevent entry of competing sperm. Magnification: x1000 at 35mm size
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / Edelmann
Bildgröße: 5053 px × 3418 px
Modell-Rechte: nicht erforderlich
Eigentums-Rechte: nicht erforderlich
Restrictions:
  • FRA USA JPN

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