False-colour TEM of a human sperm
Numéro d’image : 11874093
| False-colour transmission electron micrograph (TEM) of a single human spermatozoon,the motile,male sex cell,showing its division into a head and tail section. The sperm's tail enables it to swim,an essential action in reaching the female ovum. The mature male sex cell (male gamete) is located in the arrow-like head,the tip of which is capped by the acrosome,which releases enzymes that assist in the penetration of the egg during fertilisation. Only a single sperm succeeds in fertilisation; rapid chemical changes cause the outer membrane surrounding the ovum to thicken and form a barrier to competing sperm. Magnification: X 2,100 at 35mm size | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / CNRI |
| Taille de l’image : | 5105 px × 3702 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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