. Anatomy, descriptive and applied. Anatomy. 1274 THE ORGANS OF DIGESTION Structure.—The wall of the stomach consists of four coats—serous, muscular, submucous, and mucous, together with vessels and nerves. The serous coat {tunica serosa) is derived from the peritoneum, and covers the entire surface of the organ, excepting along the greater and lesser curvatures, at the points of attachment of the greater and lesser omenta; here the two layers of peritoneum leave a small triangular space uncovered by peritoneum along which the nutrient vessels and nerves pass. On the posterior surface of the s
. Anatomy, descriptive and applied. Anatomy. 1274 THE ORGANS OF DIGESTION Structure.—The wall of the stomach consists of four coats—serous, muscular, submucous, and mucous, together with vessels and nerves. The serous coat {tunica serosa) is derived from the peritoneum, and covers the entire surface of the organ, excepting along the greater and lesser curvatures, at the points of attachment of the greater and lesser omenta; here the two layers of peritoneum leave a small triangular space uncovered by peritoneum along which the nutrient vessels and nerves pass. On the posterior surface of the stomach, close to the cardiac orifice, there is also a small triangular ai'ea uncovered by peritoneum, where the organ is in contact with the under surface of the Diaphragm. The muscular coat {tunica viuscularis) (Figs. 1014 and 1015) is situated immediately beneath the serous covering, to which it is closely connected. It consists of three sets of smooth muscle tissue—longitudinal, circular, and oblique, from without inward, in the order named. The longitudinal fibres {stratum, longitudinale) are the most superficial, and are arranged in two sets. The first set consists of fibres continuous with the longitudinal fibres of the oesophagus; they radiate in a stellate manner from the cardiac orifice and are practically all lost before the pyloric portion is reached. The second set commences on the body of the stomach and passes to the right, its fibres becoming more closely collected as they approach the pylorus. Some of the more superficial fibres of this set pass on to the duodenum, but the deeper fibres dip in and interlace with ,the circular fibres of the pyloric valve Sphincter. The bundles of longitudinal. lagrami Fig. 1012, view of the coats of the stom- ach, duodenum, and pylorus. The ridge is the pyloric valve, (Allan Thomson.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
