Chandler J A, Sinowatz F, Pierrepoint C G
Urol Res. 1981;9(1):33-44. doi: 10.1007/BF00256837.
The ultrastructure of the epididymal duct and ductuli efferentes in the dog has been studied by electron microscopy. The epididymidis can be separated into the classical divisions of caput, corpus and cauda epididymidis on the basis of general morphology and ultrastructure. The ductuli efferentes have a low epithelium with pronounced cilia at the apices of cells and appear to provide primarily a transport role for spermatozoa. In the epididymis proper the caput region is characterized by an extremely large Golgi apparatus with large numbers of lysosomes and nuclear inclusions. Secretory activity appears to be most common in the corpus region. Absorption and secretion are most active in the first two segments while in the cauda epididymidis the long-term storage of spermatozoa in the lumen is associated with many dense crystalline bodies formed in the epithelial cells within the Golgi apparatus and possibly deriving from absorbed macromolecular material from the lumen. The theory of whole sperm cell resorption by the epididymal duct is not supported by this study.
通过电子显微镜对犬附睾管和输出小管的超微结构进行了研究。根据大体形态和超微结构，附睾可分为附睾头、附睾体和附睾尾这几个经典部分。输出小管具有低柱状上皮，细胞顶端有明显的纤毛，其主要作用似乎是为精子提供运输功能。在附睾本身，附睾头区域的特点是有一个极大的高尔基体，伴有大量溶酶体和核内包涵体。分泌活动似乎在附睾体区域最为常见。吸收和分泌在前两段最为活跃，而在附睾尾，管腔内精子的长期储存与高尔基体上皮细胞内形成的许多致密晶体有关，这些晶体可能源自从管腔吸收的大分子物质。本研究不支持附睾管对整个精子细胞进行重吸收的理论。
