管角螺消化系统的组织学研究  

Histological study on the digestive system of Hemifusus tuba

作　　者：张林林[1] 万涓涓[1] 母昌考[1] 宋微微[1] 李来国[1] 王春琳[1] 蒋霞敏[1] 

机构地区：[1]宁波大学生命科学与生物工程学院,浙江宁波315211

出　　处：《台湾海峡》2011年第4期540-545,共6页Journal of Oceanography In Taiwan Strait

基　　金：浙江省重大科技攻关项目资助项目(2009C12076)

摘　　要：本研究采用解剖学及组织学方法对管角螺消化系统的结构进行了系统分析.结果表明,管角螺的消化系统由消化道和消化腺两大部分组成.消化道包含吻、食道、嗉囊、胃、肠、直肠及肛门;消化腺由唾液腺、肝及食道腺组成,其中肝为最大消化腺.唾液腺细胞分为粘液细胞和分泌细胞;食道腺细胞由排泄细胞和杯状细胞组成.在光学显微镜下,消化道的管壁由外向内依次为:外膜、肌层、粘膜下层和粘膜层4层;唾液腺、肝及食道腺均为复管状腺.管角螺的肝由肝被膜和许多盲管(肝小管)组成,肝管的组织结构与消化道基本相同,内有单层纤毛柱状上皮,可观察到肌层和管腔.This study gives a detailed histological and anatomical account of the digestive system of Hemifusus tuba. The digestive system of H. tuba consists of digestive tract and digestive gland. The digestive tract is composed of proboscis, crop, esophagus, pharynx, stomach, intestine, rectum, and anus. The digestive gland is composed of salivary gland, liver and esophageal gland, and liver is the major digestive gland. Located at the lower end of the head and on the back of the foot, the proboscis is long and cylindrical, and plays an important role in the oral cavi- ty. The pharynx is a short duct between the mouth and the esophagus. The esophagus is a slit duct between the pharynx and the stomach. Crop is the inflation of esophageal, and the lumen of back crop turn attenuated. The long flat saclike stomach lies betweer, the left and the right livers, forming a ＂V＂ shaped relationship. The intestines is a long thin tubular structure, and it extends from the stomach to the rectum. The rectum is circular tube-shaped, and its caliber is thicker than that of the intestines. Anus is a nozzle stub that grows from the mantle border of the rectum to the mantle cavity, and its open mouth is at the bottom of the nozzle stub. The digestive tract tube wall, under a microscope view, is surrounded by a wall consisting of 4 principal layers： adventitia, lamina muscularis, submucosa and mucous membrane. The salivary gland, the liver and the esophageal gland are all compound tubular glands. The liver of H. tuba is composed of liver subcapsular and hepatic duct. The hepatic duct shares the similar structure with that of the digestive duct. Salivary gland cells can be clarified into mucous cells and secretory cells. Oesophageal gland cells consists of excretory cell and goblet cells. The glandular epithelium cells of H. tuba mostly consist of secretory cells, and the number of basophil is rare, which is probably because esophagus gland is rela- tively more developed. When H. tuba takes in food , it entangles the prey （particular

关 键 词：海洋生物学 管角螺 消化系统 组织学 解剖学 

分 类 号：P735[天文地球—海洋生物学]