File:PSM V84 D534 Facts and factors of development fig10.jpg
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DescriptionPSM V84 D534 Facts and factors of development fig10.jpg | Fig. 10. Successive stages in the cleavage and gastrulation of Amphioxus. A, one cell; B, two cells; C and D, four cells; E, eight cells; F, sixteen cells; G, blastula stage of about ninety-six cells; H, section through the same showing the cleavage cavity; I, blastula seen from the left side showing three zones of cells, viz., and upper clear zone of ectoderm, a middle (faintly shaded) zone of mesoderm and a lower (deeply shaded) zone of entoderm cells; J, section through the same showing these three types of cells; K and L, successive stages in the gastrulation; cells indicated as in the preceding figure. In all figures except D the polar body is shown at the upper pole. Figs A-H after Hatschek; Figs. I-L after Korschekt and Heider and Cerfontain. a, anterior; p, posterior; v, ventral; d, dorsal; bc, blastorcoel; gc, gastrocoel. | |||
Date | ||||
Source | Edwin Grant Conklin: Facts and factors of development. The Popular science monthly, Volume 84, p530. New York, Popular Science Pub. Co., June 1914. Online: archive.org. | |||
Author | Edwing Grant Conklin | |||
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This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:PSM_V84_D534_Facts_and_factors_of_development_fig10.jpg |
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current | 07:57, 22 March 2018 | 595 × 767 (89 KB) | Ineuw (talk | contribs) | Cleaned image, enhanced contrast | |
02:51, 19 March 2011 | 1,720 × 1,796 (353 KB) | Martin H. (talk | contribs) |
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