Items related to Outline of a course of lectures on human physiology
Synopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1889 Excerpt: ... more numerous in the young subject. These follicles are well supplied with blood, and are in most intimate connection with lymphatics. Blood is brought to the small intestine by the mesenteric artery. Its nerves are derived from the superior mesenteric plexus, which is formed by branches from the sympathetic (cceliac plexus, semilunar ganglion) and vagus nerve. Two well defined nervous plexuses are found in the wall of the intestine: an external in the muscular coat called the plexus of Auerbach; an inner finer one in the submucous coat called the plexus of Meissner. The duodenum embraces the head of the pancreas, and into it, 3 to 4 inches from the pylorus, enter by a common orifice the common bile and pancreatic ducts. The Large Intestine, 5 to 6 feet in length and 1 to 2 inches wide, extends from the ileum to the anus. It is divided into three parts, viz., Caecum, Colon, and Rectum. The colon again is divided into an ascending transverse and descending portion and the Sigmoid flexure. Where the ileum joins the ccecum is a valve, the Ileo-ccecal valve. The walls are formed of coats similar to those of the small intestine. The outer peritoneal covering does not in all parts completely surround the tube, and in the colon it is developed into little projections enclosing fat called appendices epiploic. The Muscular Coat is peculiar in the longitudinal layer, being much thickened in three parts; and, being here shorter, the intestine is thereby thrown into sacculations, which distinguish it from the smaller bowel. This sacculation causes inward projections in the shape of ridges. The Mucous Membrane has no villi, but numerous tubular glands, shorter than those of small intestine. Solitary follicles are present, but no Peyer's patches. The Vermiform Appendix ...
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