Endocrine cells such as argyrophilic cells, 5-hydroxytryptamine (5-HT) cells and gastrin cells were distributed in mucous and glandular epithelium of the digestive tract.

• 消化道粘膜上皮和腺上皮分布着嗜银细胞、5-HT细胞和胃泌素细胞等内分泌细胞，其中以胃腺上皮中数量最多，小肠次之，大肠和食管零星散布。