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False-colour TEM of fertilisation of human oocyte

False-colour TEM of fertilisation of human oocyte

P648/0020

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Credit

EDELMANN / SCIENCE PHOTO LIBRARY EDELMANN / SCIENCE PHOTO LIBRARY

Caption

False-colour transmission electron micrograph (TEM) of an oocyte (a female sex cell) following its penetration by a single human spermatozoon during fertilisation. Numerous dark granules are visible within the cytoplasm, moving towards the cell's surface. These granules contain enzymes that are involved in the mechanism which causes the membrane surroundng the oocyte to thicken following penetration by a single sperm. The mobilisation of the enzyme granules with the subsequent thickening of the membrane takes place rapidly following penetration and forms a barrier against competing sperm. Magnification: x1000 at 35mm size.

Release details

Model release not required. Property release not required.

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