Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
권호 표지

Morphology and Histology of the Digestive Organ in the Sablefish, Anoplopoma fimbria (Teleostei: Anoplopomatidae)

은대구, Anoplopoma fimbria 소화기관의 형태 및 조직학적 특징

  • Kim, Suji (Department of Aqualife Medicine, Chonnam National University) ;
  • Kang, Ju Chan (Department of Aquatic Life Medicine, Pukyong National University) ;
  • Lee, Jung Sick (Department of Aqualife Medicine, Chonnam National University)
  • 김수지 (전남대학교 수산생명의학과) ;
  • 강주찬 (부경대학교 수산생명의학과) ;
  • 이정식 (전남대학교 수산생명의학과)
  • Received : 2016.03.05
  • Accepted : 2016.03.24
  • Published : 2016.03.31
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Abstract

The RLG (relative length of gut) is 1.52 (n=12) in the sablefish, Anoplopoma fimbria. The digestive tract has five or six pyloric caeca in the posterior region of stomach. Morphology of mucosal fold is unbranched type in the esophagus and stomach, but branched type in the intestine. The histological structure of digestive tract can be divided into mucosal layer, submucosal layer, muscular layer and serous membrane in the cross section. In the esophagus, mucosal epithelial layer is a simple, and consists of ciliated columnar epithelia and mucous cells. In the stomach, gastric gland of mucosal epithelial layer is a tubular, and is composed of chief cell, parietal cell and mucin secreting cell, which is columnar and contained secretory granules of red and blue colors in the AB-PAS (pH 2.5) reaction. In the intestine, mucosal epithelial layer is a simple, and consists of ciliated columnar epithelia and goblet cells. The submucosal layer is composed mainly of collagen fibers, and well developed in the esophagus. And the muscular layer of digestive tract is divided into longitudinal and circular muscle layer, and well developed in the stomach. The liver is composed of numerous lobular structure and bile canaliculi. Stainability of hepatocyte cytoplasm was eosinophilic, and nucleus and nucleolus showed basophilic in the H-E stain. The pancreatic tissue was scattered in the fatty tissue near the digestive tract, and acinar gland consisting of numerous exocrine cells. And cytoplasmic stainability of exocrine cell was basophilic, and contained numerous zymogen granules of eosinophilic in the H-E stain.

은대구의 소화관 상대길이 비는 1.52 (n=12)이며, 소화관은 위의 후방부에 5~6개의 유문수를 가진다. 점막주름의 형태는 식도와 위에서는 미분지형이지만 장에서는 분지형이다. 횡단면에서 소화관은 조직학적으로 점막층, 점막하층, 근육층 및 장막으로 구분할 수 있다. 식도의 점막상피층은 단층이며, 원주섬모상피세포들과 점액세포들로 구성된다. 위 점막층의 위선은 관상선으로 주세포, 벽세포 및 뮤신분비세포들로 구성된다. 뮤신분비세포는 원주형으로 AB-PAS (pH 2.5) 반응에서 분홍색과 푸른색을 나타내는 분비과립을 가진다. 장의 점막상피층은 단층이며, 원주섬모상피세포들과 배상세포들로 구성된다. 점막하층은 소성결합조직층으로 주로 교원섬유들로 구성되며, 식도에서 잘 발달되어 있다. 소화관의 근육층은 종주근층과 환상근층으로 구분되며, 위에서 잘 발달되어 있다. 간은 다수의 소엽구조와 담관들로 이루어져 있으며, H-E 염색에서 간세포의 세포질은 호산성이며, 핵과 인은 호염기성을 보였다. 췌장조직은 소화관 주변의 지방조직에 산재하며, 다수의 외분비세포들로 구성된 포상선이었다. H-E 염색에서 외분비선세포의 세포질은 호염기성을 나타내며, 다수의 호산성 전효소 과립들을 함유한다.

Keywords

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