. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 406 V. M. WEIS ET AL. Nematocyte Nematocytes (Figs. 3, 4) occur along the entire length of the planula, but are exceedingly dense at the tapered end (Fig. 2). Two types of nematocysts occur in the planula: atrichous isorhizas (Fig. 4A) and desmonemes (Fig. 4B) (sensu Mariscal, 1974b). The cnidoblast originates from interstitial cells in the endoderm. The external tube extends through the cytoplasm in the early stages of development, but invaginates completely before the cell's migration to the ectoderm. The cnidocil and its
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 406 V. M. WEIS ET AL. Nematocyte Nematocytes (Figs. 3, 4) occur along the entire length of the planula, but are exceedingly dense at the tapered end (Fig. 2). Two types of nematocysts occur in the planula: atrichous isorhizas (Fig. 4A) and desmonemes (Fig. 4B) (sensu Mariscal, 1974b). The cnidoblast originates from interstitial cells in the endoderm. The external tube extends through the cytoplasm in the early stages of development, but invaginates completely before the cell's migration to the ectoderm. The cnidocil and its associated rods and stereocilia develop while the cell moves through the endoderm and ectoderm (Fig. 4C). At this stage, the nucleus is positioned under the basal end of the mature capsule (Fig. 4C). Mitochrondria with well developed cristae are prominent. Slightly to the side of the operculum are two centrioles .18 .13 .10 * .07 V) ) .04 .02 sensory cell frequency nemotocyte mucous cell muscle cell total number of cells. >-. 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: 1998px × 1251px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
