. The anatomical record. Anatomy; Anatomy. Figure 2 by Goette. Both processes will be furthered by the simulta- neous expansion of the macromeres causing their basal poles to press in the same direction (figs. 2 and 3, in which the position of arrows indicates the direction of pressure). Epibolic gastrulation, as seen in Ctenophores and Annelids, seems to indicate that not only the growth of the macromeres, but also the rapid expansion of the micromeres, are forces con- cerned in gastrulation. The effect of the excessive growth of the ectoderm is seen most strikingly in the placula of Nematode
. The anatomical record. Anatomy; Anatomy. Figure 2 by Goette. Both processes will be furthered by the simulta- neous expansion of the macromeres causing their basal poles to press in the same direction (figs. 2 and 3, in which the position of arrows indicates the direction of pressure). Epibolic gastrulation, as seen in Ctenophores and Annelids, seems to indicate that not only the growth of the macromeres, but also the rapid expansion of the micromeres, are forces con- cerned in gastrulation. The effect of the excessive growth of the ectoderm is seen most strikingly in the placula of Nematodes, and so forth, as described by Butschli. Gastrulation in the As- cidiae is also to be kept in mind. Since in the cases of gastrulation by typical invagination the non-invaginating cells are smaller than those which are to move. 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 Bardeen, Charles Russell, 1871-1935, ed; Boyden, Edward A. (Edward Allen), 1886-1976; Bremer, John Lewis, 1874- ed; Hardesty, Irving, b. 1866, ed; American Association of Anatomists; American Society of Zoologists; Wistar Institute of Anatomy and Biology. [New York, etc. ] A. R. Liss [etc. ]
Size: 1672px × 1495px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1906
