. Cunningham's Text-book of anatomy. Anatomy. 1174 THE DIGESTIVE SYSTEM. il^r^ffli^ Tunica mucosa Tela submucosa Structure of the Stomach. The stomach wall is composed of four coats—namely, from without inwards: (1) Tunica serosa, (2) tunica muscularis, (3) tela submucosa, and (4) tunica mucosa (Fig. 924). Tunica Serosa.—This coat is formed of the peritoneum, the relations of which to the stomach have already been described. It is closely attached to the subjacent muscular coat, except near the curvatures, where the connexion is more lax; and it confers on the stomach its smooth and glistening
. Cunningham's Text-book of anatomy. Anatomy. 1174 THE DIGESTIVE SYSTEM. il^r^ffli^ Tunica mucosa Tela submucosa Structure of the Stomach. The stomach wall is composed of four coats—namely, from without inwards: (1) Tunica serosa, (2) tunica muscularis, (3) tela submucosa, and (4) tunica mucosa (Fig. 924). Tunica Serosa.—This coat is formed of the peritoneum, the relations of which to the stomach have already been described. It is closely attached to the subjacent muscular coat, except near the curvatures, where the connexion is more lax; and it confers on the stomach its smooth and glistening appearance. Tunica Muscularis.—The muscular coat, which is composed of unstriped muscle, is thinnest in the fundus and body, much thicker in the pyloric portion, and very highly developed at the pylorus. It is made up of three incomplete layers—an external, stratum longitudinale; a middle, stratum circulare ; and an internal of oblique muscular fibres, fibrce obliqucB. The stratum longitudinale consists of longitu- dinal fibres, continuous with those of the oesophagus on the one hand, and those of the duodenum on the other (Fig. 926, A). They are most easily demonstrated on the lesser curvature, where they can be traced down from the right side of the oesophagus. Over the greater curvature and on the two surfaces they are present as an extremely thin and irregular sheet. Towards the pylorus the longi- tudinal fibres grow much thicker, and also much tougher and more closely united, and they take part Fig. 924.—Transverse Section through in the formation of the pyloric valve. the Wall of a Human Stomach, x 250. A ^.^ condenged W of these can be oiten made out both on the front and back at the antrum pylori, the form of which is said to be due to their presence. These bands are known as the ligamenta pylori (pyloric ligaments).. Tunica serosa tlBBS^. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabilit
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