P648/0216 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 29.7MB

Downloadable file size: 2.8MB

Price image Pricing

Please login to use the price calculator


Caption: Fertilisation. Light micrograph of a sperm cell (spermatozoan, right) swimming towards a human egg (ovum, centre). The sperm has a rounded head and a long tail with which it swims. Women usually release one egg per month, whereas men release millions of sperm in each ejaculation. Only one of these sperm can penetrate the egg's thick outer layer, the zona pellucida, and fertilise it. Fertilisation occurs when the sperm's genetic material (deoxyribonucleic acid, DNA) fuses with the egg's DNA. When this occurs the egg forms a barrier to other sperm. Magnification: x625 when printed at 10 centimetres wide.

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

Keywords: anatomy, biological, biology, blue, cell, cells, egg, female, fertilisation, fertilising, fertilization, gamete, gametes, head, human body, light micrograph, light microscope, male, ovum, penetrate, penetration, reproduction, sexual, sperm, spermatozoan, swimming, tail, zona pellucida

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