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File:Chelifer segmentation and formation of the blastoderm.jpg

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Description FIG. 50. In A the ovum is divided into a number of separate segments. In B a number of small cells have appeared (bl) which form a blastoderm enveloping the large yolk spheres. In C the blastoderm has become divided into two layers.
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https://archive.org/details/theworks02balfuoft/page/112/mode/2up?view=theater&q=blastoderm THE WORKS OF FRANCIS MAITLAND BALFOUR VOL. III

A TREATISE ON COMPARATIVE EMBRYOLOGY.
Author M. FOSTER, F.R.S., ADAM SEDGWICK, M.A.,

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current20:38, 29 February 2024Thumbnail for version as of 20:38, 29 February 2024970 × 826 (658 KB)Rasbak (talk | contribs){{Information |description=FIG. 50. In A the ovum is divided into a number of separate segments. In B a number of small cells have appeared (bl) which form a blastoderm enveloping the large yolk spheres. In C the blastoderm has become divided into two layers. |source=https://archive.org/details/theworks02balfuoft/page/112/mode/2up?view=theater&q=blastoderm THE WORKS OF FRANCIS MAITLAND BALFOUR VOL. III A TREATISE ON COMPARATIVE EMBRYOLOGY. |date=1885 |author=M. FOSTER, F.R.S., ADAM SEDGWICK,...

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