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Sea urchin embryo development

Sea urchin embryo development

C013/1949

Rights Managed

10.2 MB (10.0 MB compressed)

2301 x 1543 pixels

19.6 x 13.0 cm ⏐ 7.7 x 5.1 in (300dpi)

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Credit

GERARD PEAUCELLIER, ISM / SCIENCE PHOTO LIBRARY GERARD PEAUCELLIER, ISM / SCIENCE PHOTO LIBRARY

Caption

Sea urchin embryo development. Differential interference contrast light micrograph of a sea urchin (Paracentrotus lividus) embryo during the eight-cell stage of development. These cells, or blastomeres, result from the third division of the fertilised egg after fertilisation. They are surrounded by the zona pellucida, a tough outer layer. Following fertilisation an embryo undergoes multiple rounds of mitotic cell division, each time doubling the number of cells. Eventually a hollow ball of hundreds of cells (blastula) is produced, which then start to differentiate. Magnification: x360 when printed at 10 centimetres wide.

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