. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 350 V. J MARTIN ET FigurtS. Four-cell embryo. Bar = 100 urn. Figure 6. Forming eighl-cell embryo of hydra showing two unequal-sized tiers of cells. Bar = 100 ^m. Figure 7. Mid-cleavage embryo. Note the unequal size of the blastomeres. Cells at the distal end are smaller than those at the proximal end. Bar = 100 jim. FigureS. Late cleavage stage. The cells are more uniform in size and resemble a morula. Bar = lOO^m. Figure 9. Coeloblastula. Note the microvilli (arrows) that delineate the margins of the cells. Bar = 100 u
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 350 V. J MARTIN ET FigurtS. Four-cell embryo. Bar = 100 urn. Figure 6. Forming eighl-cell embryo of hydra showing two unequal-sized tiers of cells. Bar = 100 ^m. Figure 7. Mid-cleavage embryo. Note the unequal size of the blastomeres. Cells at the distal end are smaller than those at the proximal end. Bar = 100 jim. FigureS. Late cleavage stage. The cells are more uniform in size and resemble a morula. Bar = lOO^m. Figure 9. Coeloblastula. Note the microvilli (arrows) that delineate the margins of the cells. Bar = 100 urn. Figure 10. Cross-section of the coeloblastula. Note the single layer of cells surrounding the blastocoel. These cells contain many nurse cells (arrows). Bar = 100 ^m. treated animals were somewhat larger i 'compare Figs. 12 and 13), as would be expec ision had been interrupted. The other was that the i imbei of cells did not increase during gas- trulation in the treated animals. Thus, ingression of cells, not delamination, is the most likely explanation for the origin of the interior cells. Gastrulation is complete by 8 to 12 h Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
