Neoplene Latex鋳型による山羊胃粘膜の観察

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　ザーネン種の雄11頭 (1.5ヵ月令2, 2ヵ月令2, 2.5ヵ月令3, 3ヵ月令1, 7ヵ月令2, 4才1頭) を用いて胃粘膜の肉眼的観察を行なった･胃腔に Neoplene latex を注入した鋳型と10%ホルマリン液固定の胃壁とを比較対照しながら観察した結果,以下の所見を得た.　1. 第一胃乳頭は比較的明瞭な乳頭列を形成し,乳頭列は次のごとく一定の方向に走っている.　　(1) 節一胃右側壁 : 背･腹嚢の乳頭列は右縦筋柱を起始部とし,これより背･腹彎に向けて輪状に走る. この走行方向は胃壁輪筋層のそれとほぼ一致する. 第一胃前嚢の乳頭列もほぼ輪状に走るが,第一･二胃ヒダより前位の乳頭列は噴門の左側を輪状に取り巻いたのち,第二胃に向けて放射状に広がり,第二胃溝唇及び第二胃小室に至る.後腹盲嚢の乳頭列は腹冠状筋柱を起始部とし,これより後縁に向けて前後に走る.この走行方向は胃壁縦筋層のそれとほぼ一致する.　　(2) 第一胃左側壁 : 背･腹彎から左側壁に越えた乳頭列は背･腹嚢,第一胃前嚢及び後背盲嚢を輪状に走ったのち,それぞれの部位の左側中央水平線上で背･腹のものがくの字型に交わる.後腹盲嚢の乳頭列だけはやや前後に走り,その走行方向は胃壁縦筋層のそれとほぼ一致する.　2. 長大な第一胃乳頭が密集する部位は,各月令を通じ,第一胃前嚢下半部及び縦筋柱付近である.　3. 第二胃溝床の中央部はやや盛り上り, 左右の隅には狭い二次溝を形成している. この二次溝のうち,左唇側のものは著しく深い.　4. 第三胃乳頭の並びはあまり明確でないが,大葉ではその基部から遊離縁に向かう乳頭列を形成するように見える.　5. 第四胃ラセンヒダは第三･四胃口付近に起こり, 胃壁の側面をほぼ対称的に斜後方へ下る. このヒダは第四胃の前半ないし前2/3の範囲に存在し,しかも片側のものが大彎を越えて他側に延びることはない.Observations on the mucosa of the stomach with the naked eyes were made with eleven of bull of Saanen. By comparing molding which was produced by putting Neoplene latex into the stomach with the trip which was fixed with 10% formal observations were made. The results are as follows. 1. The rumen papillae forms a comparatively clear line of papillae and it runs in the fixed derection as follows. (1) The right wall of the rumen: The line of papillae both of the dorsal sac and ventral sac of the rumen originates from the right longitudinal pillar and from there it runs toward the dorsal curvature and ventral curvature of the rumen forming a ring. Its running direction is about the same as that of the circular muscul layer of the rumen. The line of papillae of the cranial sac of the rumen also runs forming a ring, but the line of papillae which exists in front of the ruminoreticular fold surrounds the left side of the cardia forming a ring and then it spreads like rays toward the reticulum and leads to the lips of the reticular groove and the reticular cells. The line of papillae of the caudo-dorsal blind sac seems to run forming a ring. The line of papillae of the caudoventralblind sac originates from the ventral coronary pillar, and runs in front and in the rear toward the back edge. This running direction is about the same as that of the longitudinal muscle layer of the rumen. (2) The left wall of the rumen: The line of papillae which reaches the left wall across the dorsal curvature and the ventral curvature of the rumen runs around the dorsal sac and ventral sac of the rumen, the cranial sac of the rumen and the caudo-dorsal blind sac forming a ring, and after that each of the back side and the front side crosses each other in the shape of Japanese letter " く" on the horizontal line in the left center of each part. Only in the caudo-ventral blind sac the line of papillae runs in front and in the rear and its running direction is about the same as that of the longitudinal muscle layer of the rumen. 2. The long and big rumen papillae aggregates densely near the lower part of the cranial sac of the rumen and the longitudinal pillar through every age of the bull. 3. The reticular cells of the reticular fundus is a hexagon or a pentagon in shape and the lengh of the reticular cell fold is about uniform. The reticular cells near the reticulo-omasal opening is a quadrangle in shape and the two sides of the quadrangle which are opposite to the reticuloomasal opening are longer than the other two. Being connected on the straight line with adjacent ones, these longer reticular cell folds form the groove of the reticular cell which is opposite to the reticulo-omasal opening. 4. The center part of the floor of the reticular groove is swollen slightly and forms narrow second grooves in right and left corners. Among these second grooves that in the left lip side is remarkably deep. 5. Though it is not so clear how the omasal papillae forms a line, in the highest omasal laminae the line of papillae seems to be formed toward the free border from the basic part of it. 6. The spiral folds of the abomasum originates near the omaso-abomasal opening, and falls backward obliquely along the lateral surface of the abomasum symmetrically. These folds exest within the limits of the front half or two-thirds of the abomasum, however they never spread from one side to the other by crossing over the greater curvature.
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