Coloured SEM of a human sperm fertilising an egg

Coloured SEM of a human sperm fertilising an egg

P648/0114 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 51.5MB

Downloadable file size: 4.0MB

Price image Pricing

Please login to use the price calculator


Credit: D. PHILLIPS/SCIENCE PHOTO LIBRARY

Caption: Fertilisation. Coloured scanning electron micro- graph (SEM) of a single sperm fertilising a human egg. Whereas the human female produces usually a single large egg for fertilisation, the human male releases some 300 million much smaller sperm which must travel with whiplash movements of their tail, through the uterus to reach the egg. Fertilisation occurs in the fallopian tube. Only a few hundred sperm survive the journey and encounter the egg, and only one sperm can actually fertilise the egg. The sperm penetrates the egg's wall to fuse with the egg nucleus. As soon as this happens, the egg membrane forms a barrier to other sperm. Magnification: x870 ay 6x9cm size.

Release details: Model release not required. Property release not required.

Keywords: anatomy, beginning, beginnings, egg, egg and sperm, fertilisation, fertilization, human, human body, in human fertilisation, ovum, reproduction, sperm

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.