. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. C3 D3. Figure 8. Bipmnanae in which one of the vegetal-half blastomeres was injected with HRP at the 8-cell stage. The left ventral (A), left dorsal (B). right dorsal (C), and right ventral (D) parts of the posterior ectoderm and part of the digestive tract are stained, respectively. Scale bar = 100 ^m. All photographs are printed to allow observation from the dorsal side. AI -Dl are focused at the anus; C2 and D2 are focused at the ventral surface of the stomach: A3. B2. and D3 are focused at the axis of the esophagus: and
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. C3 D3. Figure 8. Bipmnanae in which one of the vegetal-half blastomeres was injected with HRP at the 8-cell stage. The left ventral (A), left dorsal (B). right dorsal (C), and right ventral (D) parts of the posterior ectoderm and part of the digestive tract are stained, respectively. Scale bar = 100 ^m. All photographs are printed to allow observation from the dorsal side. AI -Dl are focused at the anus; C2 and D2 are focused at the ventral surface of the stomach: A3. B2. and D3 are focused at the axis of the esophagus: and A3, B3, and C3 are focused at the dorsal surface of the stomach. The band of labeled cells is twisted clockwise in the stomach, and counterclockwise in the esophagus in all cases. The anterior and posterior halves of the left posterior coelom are labeled in B2 and C2, respectively. The movements of mesendoderm cells in larvae of A. pectinifera are shown in Figure 10. The cellular volume of the vegetal plate which invaginated at the start of gas- trulation is 8-10% of the total volume of the embryo. Later, this region becomes the swelled region at the tip of the archenteron and sheds mesenchvme cells into the blastocoel. The anterior half of this region begins to project laterally at the mouth-formation stage, and becomes the anterior coelom of the bipinnaria. The posterior half of this region differentiates into the esophagus. The cells in the presumptive stomach and left posterior coelom area are added to the archenteron from the early gastrula stage. 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 Cla
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
