A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine (1885) (14595101717)

Identifier: manualofhumanphy01land (find matches)
Title: A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine
Year: 1885 (1880s)
Authors: Landois, L. (Leonard), 1837-1902 Stirling, William, 1851-1932
Subjects: Physiology Histology
Publisher: Philadelphia, P. Blakiston, Son, and Company
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library



Text Appearing Before Image:
e of the small intestine. Theserous coat has the same structure as that ofthe small intestine. The muscular coat hasexternal longitudinal fibres occurring all round thegut, but they form three flat ribband-like longi-tudinal bands in the caecum and colon. Insidethis coat are the circular fibres. The sub-milCOSa is practically the same as that of thesmall intestine. The niUCOSa is characterisedby negative characters. It has no villi andno Peyers patches, but otherwise it resemblesstructurally the small intestine, consisting of abasis of adenoid with the simple tubular glandsof Lieberkiikn (Fig. 155). These glands are verynumerous and somewhat longer than those of thesmall intestine, and they always contain farmore goblet-cells. The cells lining them aredevoid of a clear disc. Solitary glands occurthroughout the entire length of the large intes-tine. At the bases of Lieberkiihns glands isthe muscularis mucosce. The blood-vessels andnerves have a similar arrangement to thosethe stomach.)
Text Appearing After Image:
155. Lieberkiihns gland fromlarge intestine (dog). the in 191. Absorption of the Digested Food. The physical forces concerned are endosmosis, diffusion, and filtration. All the constituents of the food, with the exception of the fats, which in partare changed into a fine emulsion, are brought into a state of solution by the digestiveprocesses. These substances pass through the walls of the intestinal tract, eitherinto the blood-vessels of the mucous membrane or into the beginning of thelymphatics. In this passage of the fluids two physical processes come into play—endosmosis and diffusion as well as filtration. I. Endosmosis and diffusion occur between two fluids which are capable offorming an intimate mixture with each other, e.g., hydrochloric acid and water,but never between two fluids which do not form a perfect mixture, such as oil andwater. If two fluids capable of mixing with each other, but of different com-positions, be separated from each other by means of a septum with ph