. Éléments de l'anatomie comparée des vertébrés. Anatomie, comparatif. ;2G8 structures ANATOTSIY COMPARATIF connu sous le nom de glandes d'Lieberhiihn ou cryptes, ainsi qu'aux glandes muqueuses acineuse. Les cellules caliciformes sécrétrices muqueuses sont BM M^ L Z S. Vm. 214 Semidiagkammatic Tbansvekse.âA, Section d'un Poktiou WalIj de l de l'intestin. À partir de l'état combiné (vu dans les plus bas et les vertébrés supérieurs. B), des cellules épithéliales de l'intestin. /Â *, péritonéal de l'investissement ; l'intestin^ M, couche musculaire longitudinale ; M^, couche musculaire circulaire ; Z, des tissus conjonctifs ; couche S, muqueuse,

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. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative. ;2G8 COMPARATIVE ANATOTSIY structures known as the crypts or glands of Lieberhiihn, as well as to acinous mucous glands. Mucous-secreting goblet cells are BM M^ Z L S. Vm. 214.âA, Semidiagkammatic Tbansvekse Section of a Poktiou of the WalIj of the Intestine. (Combined from the condition seen in both lower and higher Vertebrates.) B, Epithelial cells of the intestine. /â *, peritoneal investment of tlie gut; M, longitudinal muscular layer ; M^, circular muscular layer ; Z, connective-tissue layer ; S, mucous membrane, which is raised to form villi at Zo. (The connective-tissue layer and epithelium are designedly drawn much too large relatively as compared with the outer coats.) G, G, vessels, the larger trunks running between the peritoneum and the muscular layer ; the finer vessels branch out into the intermediate layer ; these surround the masses of lymph-cells, LL, as well as the glands, and send fine loojis into the villi (at &'); DD, apertures of the glands; E, E, epithelial cells of the mucous membrane, with their striated border, from which at E^ amoeboid processes are extruded : in Fig. B, a, h, these cells are drawn to a much larger scale (Sn, striated border) ; Ly, scat- tered lymph-cells in the intermediate layer ; i', L'^, lymph-cells in the act of passing through the mucous membrane ; at L', several have already passed into the alimentary cavity ; LL, masses of lymph-cells (solitary follicles) ; Lipn, lymph-vessels in the villi. common throughout the alimentary epithelium of Vertebrates, [n Monotremes, as already mentioned (p. 265), gastric glands are absent, but the intestinal glands are highly developed.. 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 work.. Wiedersheim, Robert, 1848-1923; Parker, William N

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