. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 42 P. FLAMMANG ET AL Ml 25 cu. Figures 21-25. Fine structure of the disk epidermis of locomotory podia of AMcnas mbens and Mar- lhasterias gladalis. BF, bundle of filaments; C, cilium; CS, ciliated secretory cell; CU, cuticle; G. Golgi zone; MI. mitochondrion; MV, microvilli; NSC, nonsecretory ciliated cell; SC. support cell; SG, secretory granule; SR, striated rootlet; V, vesicle. Figure 21. Nucleus-containing hasal part of a type 2 nonciliated secretory cell (NCS 2 cell) (.-I- rubens). Figure 22. NCS2 cell secretory granul
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 42 P. FLAMMANG ET AL Ml 25 cu. Figures 21-25. Fine structure of the disk epidermis of locomotory podia of AMcnas mbens and Mar- lhasterias gladalis. BF, bundle of filaments; C, cilium; CS, ciliated secretory cell; CU, cuticle; G. Golgi zone; MI. mitochondrion; MV, microvilli; NSC, nonsecretory ciliated cell; SC. support cell; SG, secretory granule; SR, striated rootlet; V, vesicle. Figure 21. Nucleus-containing hasal part of a type 2 nonciliated secretory cell (NCS 2 cell) (.-I- rubens). Figure 22. NCS2 cell secretory granule (A/, gladalis). Figure 23. Apical bulge of a ciliated secretory cell (CS cell) (A/ xlm-uiHx). Figure 24. CS cell secretory granules (.J. rubens). Figure 25. Apex of a nonsecretory ciliated cell (A/ i;U/ciali\). A few micrometers before iv;uhing the disk surface, sup- port cells enlarge, forming an a ;ichment area for the col- lagen fibers of the connective tissue sheets. A two-layered cuticle covers the epidermal cells of the disk (Figs. 12, 23, 30). The cuticle is traversed by the epidermal cell microvilli and by the tips of the cilia of NSC cells, and is regularly interrupted by the secre- tory pores of NCS cells. It consists of an internal fila- mentous layer (about 600 nm thick in A. ruhcns and 350 nm in .17. glacialis) and an external granular layer (about 200 nm thick in A. nthens and 100 nm in M. glacialis). The external layer is strongly labeled with ruthenium red, showing that it bears many negatively charged sites (Luft, 1971). The cuticle is separated from. 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-; Re
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
