. The anatomy of the frog. Frogs -- Anatomy; Amphibians -- Anatomy. THE ALIMENTARY TRACT. 291. Isolated fold of mucous membrane of small intestine of Rana lemjioraria ; after Langer. Forty times natural size. Blood-vesseLs striped, lacteals shaded. lacteals are not simple but in the form o£ a coarse network (Fig. 189), (Langer).] (7) [The nerves of tlie Fig. 190. small intestine (p. 200) usu- al ly follow the arteries to the muscular coats, between which they form a plexus (Auerbach's plexus) ; from this numerous twigs are given off, which coiirse alone or in company with vessels to the mucous
. The anatomy of the frog. Frogs -- Anatomy; Amphibians -- Anatomy. THE ALIMENTARY TRACT. 291. Isolated fold of mucous membrane of small intestine of Rana lemjioraria ; after Langer. Forty times natural size. Blood-vesseLs striped, lacteals shaded. lacteals are not simple but in the form o£ a coarse network (Fig. 189), (Langer).] (7) [The nerves of tlie Fig. 190. small intestine (p. 200) usu- al ly follow the arteries to the muscular coats, between which they form a plexus (Auerbach's plexus) ; from this numerous twigs are given off, which coiirse alone or in company with vessels to the mucous coat, where a second plexus (Meissner^s plexus) is formed. Auerbach's plexiis, according to Klein, consists of bands of nervous fibrils in endothelial sheaths ; they branch and inosculate, and thus form a plexus. Where several such branches meet, a more or less complicated decus- sation of the bands of fibres takes place. Along these nervous bands are ganglion cells, either isolated or in groups. The cells are large, generally spherical, and contain a sharply outlined nucleus with a single or double nucleolus. The smaller cells generally appear to possess only one process, which can be traced from the protoplasm of the cell between the fibrils of the nerve-trunk. The larger cells are distinctly multipolar, their protoplasm being provided with a number of fine processes, or, as is oftener the case, with one large and several small processes. In many in- stances Klein was able to distinguish around the ganglion-cells a capsule of a spherical or ovoid shape. In these cases the body, as well as the processes of the ganglion-cell, were lying within the capsule. This system of ganglion- cells is in connection with the individual bimdles witliin the nerve-trunks. r 2. 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
Size: 2041px × 1225px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookpublisheroxfordclarendonpre
