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False-colour SEM of embryo at the morula stage

False-colour SEM of embryo at the morula stage

P680/0233

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Credit

PROFESSORS P.M. MOTTA & J. VAN BLERKOM / SCIENCE PHOTO LIBRARY PROFESSORS P.M. MOTTA & J. VAN BLERKOM / SCIENCE PHOTO LIBRARY

Caption

Embryo development. False-colour scanning electron micrograph of an embryo at the early stage known as the morula. The egg reaches this phase about 4 days after fertilisation after a series of mitotic divisions. At this stage about 12-16 cells are present and are surrounded by a thin glycoprotein layer, the zona pellucida, which was here removed. The inner cells of the morula will give rise to the tissues of the embryo while the outer cells, covered here by microvilli (tiny orange ridges), will form the placenta. The morula will implant into the uterus six days after fertilisation. Magnification: x645 at 6x7cm size. Magnification: x1005 at 4x5 inch size. This is a mouse morula.

Release details

Model release not required. Property release not required.

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