论文部分内容阅读
三角帆蚌消化系统由消化腺──肝脏和消化道──口、食道、胃、肠组成．肝脏为分枝的复管腺，腺细胞呈现出两种细胞形态，一种为消化细胞，另一种为未成熟细胞．消化道由粘膜层、粘膜下层和外膜构成，无肌层．粘膜上皮均为单层柱状上皮，游离面具纤毛和微绒毛．不同部位的粘膜上皮和粘膜下层略有区别．消化道上皮自我更新能力强，新生的上皮细胞有着特殊的固着方式．饥饿状态下的胃肠粘膜下层出现大量脂质团块，是一种能量代偿作用产物．
Hyriomophila digestive system by the digestive gland ─ ─ liver and digestive tract ─ ─ mouth, esophagus, stomach, intestine. The liver is a branched prosthetic gland, and the glandular cells present two cell morphologies, one for digestive cells and the other for immature cells. Gastrointestinal tract by the mucosa, submucosa and adventitia, no muscle. Mucosal epithelium is a single columnar epithelium, free mask cilia and microvilli. Different parts of the mucosal epithelium and submucosa slightly different. Gastrointestinal epithelial self-renewal ability, newborn epithelial cells have a special way of fixation. Starvation under the gastrointestinal mucosa appeared a large number of lipid clumps, is a product of energy compensation role.