Franceschini F, Sbarbati A, Zancanaro C
Institute of Human Anatomy and Histology, University of Verona, Italy.
J Submicrosc Cytol Pathol. 1991 Apr;23(2):221-31.
The ultrastructure of the vomeronasal organ (Jacobson's VNO) of the frog, Rana esculenta, was studied under the transmission and scanning electron microscope. Four cell types were identified: ciliated, bipolar, glial-like, and basal. Ciliated cells are unique to the frog VNO and show morphological evidence of secretion; bipolar (neuronal) cells are arranged in columns and reach the free surface of the epithelium with knobs bearing microvilli. The latter are in contact with amorphous material not described previously. Glial-like cells wrap bipolar cells in the epithelium and poorly differentiated basal cells are found just over the basal lamina. The vascular pump described in mammal VNO is not present at all in the frog VNO. We conclude that in the frog the VNO is closer to the reptilian than the mammalian VNO, although the frog VNO shows some unique morphological characteristics.
利用透射电子显微镜和扫描电子显微镜对食用蛙（Rana esculenta）的犁鼻器（雅各布森氏犁鼻器，VNO）的超微结构进行了研究。识别出了四种细胞类型：纤毛细胞、双极细胞、类神经胶质细胞和基底细胞。纤毛细胞是蛙VNO所特有的，并且显示出分泌的形态学证据；双极（神经元）细胞呈柱状排列，通过带有微绒毛的小瘤到达上皮的游离表面。后者与先前未描述的无定形物质接触。类神经胶质细胞在上皮中包裹双极细胞，并且在基膜上方发现了分化程度较低的基底细胞。哺乳动物VNO中描述的血管泵在蛙VNO中根本不存在。我们得出结论，在蛙中，VNO比哺乳动物的VNO更接近爬行动物的VNO，尽管蛙VNO显示出一些独特的形态特征。
