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Fertilised egg cell dividing

Fertilised egg cell dividing

C023/4595

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Credit

MAURIZIO DE ANGELIS / SCIENCE PHOTO LIBRARY MAURIZIO DE ANGELIS / SCIENCE PHOTO LIBRARY

Caption

Fertilised egg cell dividing. Computer illustration of a fertilised human ovum (egg cell) that has divided into eight cells (blastomeres) within the zona pellucida (outer layer). After fertilisation the nuclei of the sperm cell and the ovum fuse to form a zygote. The zygote then undergoes repeated mitosis (cell division). Cell division occurs approximately every twenty hours, to form a cluster of cells known as a morula, which continues to divide to form a blastocyst, and subsequently the embryo.

Release details

Model release not required. Property release not required.

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