. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. than elsewhere consequently the region stains more deeply. This region differentiates later on into the middle region of the repro- ductive ducts. Sections through this region at this stage show a 'number of nuclei often surrounded by more or less cytoplasm without definite boundary. These nuclei are indistinguishable from the other parenchymal nuclei except that many of them are smaller. Parenchymal fibers can often be traced from the cells and the region is not marked off in any way from the parenchyma. But the most intere
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. than elsewhere consequently the region stains more deeply. This region differentiates later on into the middle region of the repro- ductive ducts. Sections through this region at this stage show a 'number of nuclei often surrounded by more or less cytoplasm without definite boundary. These nuclei are indistinguishable from the other parenchymal nuclei except that many of them are smaller. Parenchymal fibers can often be traced from the cells and the region is not marked off in any way from the parenchyma. But the most interesting point forpresent purposes is the appar- ent absence of mitosis in these regions. Although the writer has examined hundreds of sections of these early stages he has never seen a single case of mitosis. Yet it is very evident that an ex- ceedingly rapid multiplication of nuclei is taking place, for the size of the area and the number of nuclei increases rapidly with. 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
Size: 1637px × 1527px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
