小熊猫咽和食管的组织学研究

Histological Study on Pharynx and Esophagus of Red Panda

对小熊猫的咽和食管的组织结构进行了研究.结果表明:小熊猫的咽壁由粘膜(包括上皮和固有膜)、粘膜下层内除咽肌所组成.粘膜下层内除分布有混合腺外,还有大量的骨骼肌纤维束.小熊猫的食管壁由粘膜(包括上皮、固有膜和粘膜肌、粘膜下层、肌肉层和纤维膜所组成.食管壁的厚度,食管腔的大小及食管皱襞的有无等方面存在较大个体差异.固有膜有乳突插入复层扁平上皮内.粘膜下层内有大量的食管腺分布.肌肉层从食管的前段到后段全是骨骼肌,分内、外两层,并不呈典型的内环行、外纵行排列,而呈现多样性,并与大熊猫食管壁组织结构作了比较研究.

The wall of the pharynx consists of tunica mucosa, tela submucosa and pharyngeal muscle. Especially, there are lots of skeletal muscle fibers in the tela submucosa besides the mixed gland. The wall of the esophagus is composed of tunica mucos, tela submucosa,tunica muscularis and fibrose. The individual differences take place in thickness of the wall,diameter of the cavity and existence of the esophageal longitudinal fold. The papillae of the lamina propria stretch into the stratified squamous epithelium.There are plenty of esophageal glands in the tela submucosa. The tunica muscularis which is all skeletal muscle from the front part to the behind part of the esophagus has inner and outer two layers, whose arrangement of the muscular fibers has diversities. The esophageal tissue structure in red pandas has been compared with that in giant pandas.