The cat - an introduction to the study of backboned animals, especially mammals (1881) (20398735110)

Title: The cat : an introduction to the study of backboned animals, especially mammals

Identifier: catintroduction00miva (find matches)

Year: 1881 (1880s)

Authors: Mivart, St. George Jackson, 1827-1900

Subjects: Cats; Anatomy, Comparative

Publisher: New York : Scribner's

Contributing Library: The Library of Congress

Digitizing Sponsor: The Library of Congress

Text Appearing Before Image:

chap, vi.) THE CAT'S ALIMENTARY SYSTEM. 179 etc called its " lesser curvature (Ic). The opposite very convex side is called its greater curvature (gc). Its structure is essentially similar to that of the oesophagus. Its muscular coat, formed of organic fibres, consists of an outer radiating layer, directly continuous with the more longitudinal layer of the oesophagus. Within this is a layer of circular fibres which extends over the whole sto- mach, and is especially thick at the pylorus, where it forms a sphincter which, project- ing inwards, constitutes (with areolar tissue arid its mucous lining) what is called the py- loric valve " (Fig. 90, B, pv). Within the second muscular layer is yet a third set of obliquely disposed fibres. Immediately within the muscular stratum is a layer of submucous areolar tissue, which directly supports the mucous lining of the stomach. This lining is soft, thick, and smooth, and is so loosely connected by the areolar layer with the muscular coat, that it is thrown into numerous, regular, undulating effaceable folds when the stomach is not distended. The inner surface of the stomach is everywhere beset with small pits, which are the orifices of minute close-set gastric and peptic glands, which may be simple tubes or more or less branching. At the lower end of the oesophagus the squamous epithelium ceases and gives place to what is mostly of the columnar kind. The function of the stomach is partly mechanical, since by their contractions, its many muscular fibres rotate its contents, and so expose all parts in turn to the action of its secreting walls while they drive it towards the pylorus, and send through that aperture such portions of it as are sufficiently dissolved or soft. Regurgitation of food into the oesophagus is prevented by the contraction of the circular fibres which surround its entrance into the stomach. The main action of the stomach is digestive through the gastric juice. This consists of water, with some two per cent, of saline matters, a minute quantity of free hydrochloric acid and a little more than three per cent, of pepsin, a neutral, albuminoid substance. N 2

Text Appearing After Image:

Fig. 93.—Thi Intestinal Tube of the Cat, seen VENTRALLY, WITH TS FOLDS SOMEWHAT SEPARATED. a Anus. ac. Ascending colon. ce. CE-ophagus. c. Cardia. cm Gee u m. d. Duodenum. dc. Descending colon. Ic. Lesser curvature. p. Pylorus. r. Rectum. si. Small intestine. st. Stomach. tc. Transverse colon. x. Greater curvature.

кошка введение в изучение позвоночных животных, особенно млекопитающих 1881 г. книжные иллюстрации животные млекопитающие изображения из интернет-архива библиотека Конгресса

1881

Library of Congress

http://commons.wikimedia.org/

public domain