摘要
毛嵌线螺 (Cymatiumpileare)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 .
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 oesophagus, 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 structure of epithelia of their inner walls. The inner wall of foreintestine 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 toxin 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.
出处
《海洋学报》
CAS
CSCD
北大核心
2001年第3期99-104,T005,共7页
基金
海南省百项农业新技术资助!项目 (NB0 0 1)
