毛嵌线螺的研究 Ⅲ.消化系统的结构和功能

周永灿; 曾水香; 苏永全

毛嵌线螺的研究 Ⅲ.消化系统的结构和功能

1.
海南大学水产系, 海南海口570228;厦门大学海洋系, 福建厦门361005
2.
海南大学水产系, 海南海口570228
3.
厦门大学海洋系, 福建厦门361005

基金项目: 海南省百项农业新技术资助项目(NB001)

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出版历程
- 收稿日期: 1999-12-07
- 修回日期: 2001-02-15

Studies on Cymatium pileare Ⅲ. Structure and function of digestive system

1.
Fishery Department, Hainan University, Haikou 570228, China;Oceanology Department, Xiamen University, Xiamen 361005, China
2.
Fishery Department, Hainan University, Haikou 570228, China
3.
Oceanology Department, Xiamen University, Xiamen 361005, China

摘要

摘要: 毛嵌线螺(Cymatium pileare)的消化系统包括口腔、食道、胃、肠、肛门、唾液腺和肝脏.其头部有可伸缩的“Argobuccinum”型吻,口腔位于吻前端,其中有1对颚片和1条齿舌带.颚片表面有整齐排列的小齿;齿舌的齿式为:2·(7)1·(5～6)1(5～6)·1(7)·2.在食道中央有一膨大的嗉囊,它能暂时储存和初步消化食物;胃呈U形,腹面有2个肝管的入口;肠较短,前肠的内壁上皮为复层柱状上皮,后肠的内壁上皮为假复层纤毛柱状上皮.毛嵌线螺的唾液腺已特化为毒腺,其分泌的毒素对辅助捕食具重要作用;肝脏只有1叶,为复管泡状腺,肝细胞内有线粒体、粗面型内质网、高尔基复合体和溶酶体等细胞器.
- 毛嵌线螺 /
- 消化系统 /
- 结构 /
- 功能
Abstract: The digestive system of Cymatium pileare consists of buccal cavity,oesophagus,stomach,intestine, anus,salivary gland and liver.There is a contractible "argobuccinum" form proboscis in the anterior extremity of its body,and the buccal cavity lies in the anterior part of the proboscis.There are a pair of jaws and a piece of radular ribbon in buccal cavity.The jaws have many neatly arranged sickle-shaped sharpen denticles.The dentition formula of radula is:2·(7)1·(5~6)1(5~6)·1(7)·2.In the middle of oesophag us,there is an expanded crop,which has the function of temporarily storing food and preliminarily digesting food.The stomach is U-shaped and there are 2 entrances for liver ducts in its ventral side.The intestine is short and can be divided into 2 parts based on the struture of epithelia of their inner walls.The inner wall of for eintestine is stratified columnar epithelium,but the inner wall of hindintestine is pesudostratified columnar epithelium.The salivary gland of C.pileare is toxic gland and the tox in extracted from it plays a great role on its predation.The liver of C.pileare is compound tubuloacinar gland with mitochondrion,rough endoplasmic reticulum,Golgi complex and lysosome in its glandular cells.
- Cymatium pileare /
- digestive system /
- structure /
- function

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