关键词: 大熊猫, 胃肠道, 内分泌细胞, 形态

Abstract: Endocrine cells containing 5-hydroxytryptamine, somatostatin, gastrin, cholecystokinin, neurotensin, motilin, gastric inhibitorypeptide, glucagon, vasoactive intestinal polypeptide, and endorphin in the mucosae of the fundus, pylorus, duodenum, jejunum, ileum, colon, and rectum of 2 giant pandas were studied by PAP method to gain an insight into the adaptive characteristics for the special feeding habit. The former 8 kinds of endocrine cells were detected in the mucosae of the 2 giant pandes. The distribution of cell types categorized by the cytoplasmic process indicated that in the 7-year old giant panda, the fundic endocrinecells were mostly round or ovoid, apical and basal cytoplasmic processes were rarely seen; many pyloric endocrine cells pocessed both apical and basal processes; while endocrine cells in the small intestine only pocessed apical process. In the 75-day old giant panda, the cell types of the gut endocrine cells are few than those of the 7-year old one. These results indicate that the structure and the distribution of the morphological types of the endocrine cells in the mucosa of the giant panda might be related to their specific feeding habit.

Key words: Giant Panda, gastrointestinal tract, endocrine cell, morphology