False-colour TEM of a human sperm penetrating ovum
Bildnummer 11874339
| False-colour transmission electron micrograph (TEM) showing penetration of an ovum by a single human spermatozoon,prior to fertilisation. The whole 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: | 5425 px × 3524 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: |
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