Orsi A M, Dias S M, Seullner G, Guazzelli Filho J, Vicentini C A
Anat Anz. 1987;163(3):249-54.
The ductuli efferentes of the pig have 2 distinct and continuous segments: the proximal or intratesticular segment that is formed in sequence to the labyrinthic portion of the rete testis, on the cranial extremity of the testis, and the distal or epididymal segment that forms the Cani vasculosi or Lobuli epididymidis. The testicular ductuli are more thicker and the epididymal ductuli are more thin, long and flexuous. The last segment is very coiled and forms a bulboid structure that is placed in the head of the epididymis, in which the ductuli jumped into the initial segment of the epididymis. Each efferent duct is formed by a single and cuboidal/columnar epithelium in which are identified three cellular types: ciliated cells, non ciliated cells and intra-epithelial lymphocytes. The epithelial lining rests on a conspicuous basement membrane that is surrounded by collagen fibrils. Among the ductuli is identified a loose connective tissue.
近端或睾丸内段，在睾丸头端，与睾丸网的迷路部分依次形成；远端或附睾段，形成血管襻或附睾小叶。睾丸输出小管更粗，附睾输出小管更细、更长且弯曲。最后一段非常盘绕，形成一个球样结构，位于附睾头部，输出小管在此处汇入附睾起始段。每条输出小管由单层立方/柱状上皮构成，可识别出三种细胞类型：纤毛细胞、非纤毛细胞和上皮内淋巴细胞。上皮衬里位于一层明显的基底膜上，基底膜被胶原纤维包围。在输出小管之间可识别出疏松结缔组织。
