. Text-book of normal histology: including an account of the development of the tissues and of the organs. ners plexus . ^, groups of ganglion-cells ;i, blood-vessel. (After Stohr.) lated and pale fibres ; at the nodal points of this net-work numerousmicroscopic ganglia are situated, the whole forming the intramuscularganglionic plexus of Auerbach. From this plexus fibres are distributed to the serous coat and tothe longitudinal layer of muscle, as well as to the outer part of thecircular layer. The intramuscular net-work is continued by numeroussmall bundles of fibres, which, after piercing t
. Text-book of normal histology: including an account of the development of the tissues and of the organs. ners plexus . ^, groups of ganglion-cells ;i, blood-vessel. (After Stohr.) lated and pale fibres ; at the nodal points of this net-work numerousmicroscopic ganglia are situated, the whole forming the intramuscularganglionic plexus of Auerbach. From this plexus fibres are distributed to the serous coat and tothe longitudinal layer of muscle, as well as to the outer part of thecircular layer. The intramuscular net-work is continued by numeroussmall bundles of fibres, which, after piercing the inner layer of cir-cular muscle, and giving off lateral twigs to the inner part of thesame, enter the submucosa to form there a second ganghonic plexussimilar to the one lying between the muscular layers : this is theplexus of Meissner. The submucous plexus sends off numerousfibres into the mucosa, which are distributed beneath the epithelium i68 NORMAL HISTOLOGY. and to the gastric glands ; the exact mode of termuiation of thesenerve-fibrillae within the mucosa, however, is still undetermined. Fig. ^f/^->> THE INTESTINES. The four coats of the stomach are continued, with little modifica-tion, into the mucous, the submucous, the muscular, and theserous tunics of the intestinal wall; the variations characterizingthe several divisions of this tube are dependent largely upon modi-fications and specializations of the mucous membrane. The free inner surface of the small intestine is studded over withsmall cylindrical elevations—the villi—j^rojecting into the intestinal lumen and bathed in thejuices of the canal. Inaddition to the villi, whichare found through thewhole extent of the smallintestine, the mucousmembrane is thrown intotransverse or oblique per-manent folds — the val-vulae conniventes —which extend partiallyaround the tube, and aremost marked in the duo-denum and the jejunum ;these folds increase thearea of the mucous sur-face, and are beset withvilli the
Size: 2063px × 1211px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublisherphiladelphiajblipp
