50.3 MB (7.6 MB compressed)
4192 x 4192 pixels
35.6 x 35.6 cm ⏐ 14.0 x 14.0 in (300dpi)
CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY
Fertilised egg dividing. Illustration showing a fertilised ovum (egg cell) which has divided into two cells (blastomeres) by mitosis. 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.
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