仿刺参消化系统的组织学和组织化学研究

用组织学和组织化学方法研究了仿刺参的消化系统。消化道管壁由粘膜层、粘膜下层、肌层和外膜组成。粘膜层为假复层或单层的柱状细胞或立方细胞与粘液细胞。粘液细胞分布于前肠的前段和排泄腔。前肠和中肠上皮具蛋白酶、脂酶和非特异性酯酶活性。中肠上皮细胞游离端有密集微绒毛，游离端质膜呈碱性磷酸酶活性，上皮下有丰富的血窦，表明具吸收作用。

Histological and Histochemical Studies on the Digestive System of Apostichopus japonicus

The digestive system of Apostichopus japonicus was studied with histological and histochemical methods.The wall of the digestive tract includes mucosa,submucosa muscular layer and adventitia.The mucosa consists of pseudo\|mucous cells.The mucous cells lie in the anterior part of the foregut and cloaca.The epithelium of the foregut and the midgut shows proteinase,lipase and nonspecific stritified or simple epithelium which is made up of columnar or cuboidal cells and esterase activitis.In the midgut,the apithelial cells with dense microvilli show alkaline phosphatase activity in the apical membrine,and the blood space is plentiful beneath the epithelium,which suggests that the midgut play a great role in food absorption.