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Fertilisation
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Fertilisation
Fertilisation. Computer artwork of one of a group of human sperm (spermatozoa) penetrating an egg (ovum). Only one sperm can penetrate the eggs thick outer layer (zona pellucida) and fertilise it. Fertilisation occurs when DNA (deoxyribo- nucleic acid) released by the sperm fuses with DNA contained in the egg. Women produce a single egg at a time, whilst men release around 500 million sperm. The sperm use their flexible tails to travel through the female reproductive tract. Only a few thousand sperm reach the egg, located in one of the Fallopian tubes
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6455623
© MEHAU KULYK/SCIENCE PHOTO LIBRARY
Fertilisation Fertilising Fertilization Fertilizing Gamete Gametes Germ Cell Moving Ovum Penetrating Propelling Re Production Reproductive System Sex Cell Sexual Reproduction Sperm Spermatozoa Spermatozoon Swimming Tail Tails Zona Pellucida Cells Computer Artwork
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