. Anatomy, descriptive and applied. Anatomy. THE STOMACH 1275 the fundus and pass over into larger and larger rings to encircle the entire organ. At the pylorus they are most abundant, and are aggregated into a circular ring or Sphincter, which projects into the cavity, and forms, with the fold of mucous membrane covering its surface, the pyloric valve (Fig. 1012). The circular fibre stratum is continuous with the circular layer of the oesophagus, the fibres being interlaced at the transition. The oblique fibres (jibrae obliquae) arise at the left side of the cardia from the circular fibres of
. Anatomy, descriptive and applied. Anatomy. THE STOMACH 1275 the fundus and pass over into larger and larger rings to encircle the entire organ. At the pylorus they are most abundant, and are aggregated into a circular ring or Sphincter, which projects into the cavity, and forms, with the fold of mucous membrane covering its surface, the pyloric valve (Fig. 1012). The circular fibre stratum is continuous with the circular layer of the oesophagus, the fibres being interlaced at the transition. The oblique fibres (jibrae obliquae) arise at the left side of the cardia from the circular fibres of the cesophagus. The fibres pass down in the anterior and posterior walls, and almost reach the pylorus. Certain oblique muscular fibres encircle the fundus of the stomach in a series of rings. The submucous coat {tela submucosa) consist of loose areolar tissue, connecting the mucous and muscular coats. It supports the large bloodvessels previous to their distribution to the mucous membrane; hence it is sometimes called the vascular Fig. lOH.—1'he middle and deep muscular layer of the stomach, viewed from above and in front. (Spalteholz.) The mucous membrane (tunica mucosa) (Figs. 1015, 1016, 1017, and lOlS) is thick, its surface smooth, soft, and velvety. In the fresh state it is of a pinkish tinge at the pyloric end, and of a red or reddish-brown color over the rest of the surface. In infancy it is of a brighter hue, the vascular redness being more marked. It is thin at the cardiac extremity, but thicker toward the pylorus. During the contracted state of the organ it is thrown into numerous folds or rugae [plicae mucosae) (Figs. 1015 and 1016), which for the most part have a longitudinal du-ection, and are most marked toward the pyloric end of the stomach and along the greater curvature. These folds consist of mucous and submucous coats, and are entirely obliterated when the organ becomes fully distended. Structure of the Mucous Membrane.—When examined with a lens
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
