Riemann John G, Thorson Barbara J
Metabolism and Radiation Research Laboratory, United States Department of Agriculture, Agricultural Research Service, Fargo, North Dakota 58102.
J Morphol. 1976 Aug;149(4):483-505. doi: 10.1002/jmor.1051490404.
Each vas deferens of the Mediterranean flour moth, Anagasta kuehniella (Zeller), consists of a short swollen portion immediately below the testis, another swollen portion that forms a seminal vesicle, and an elongate lower portion that empties into one arm of the ductus ejaculatoris duplex. Three types of epithelial cells occur sequentially. Phagocytic cells that engulf debris from the testis form the anterior two-thirds of the first swollen portion. Tall secretory cells form the distal third of the first swollen region and extend to the seminal vesicles. The secretory cells surround a slit-like lumen and appear to function as a valve between the two swollen regions. Many membrane-enclosed secretory granules are stored at the apical ends of the cells and are released into the lumen together with small amounts of the surrounding cytoplasm. The granules remain intact while they are in the male tract. A second type of secretory cell forms the walls of the seminal vesicles and the lower vasa deferentia. These cells produce secretory granules whose contents become dispersed through the semen. PTA-chromic acid staining indicates that the seminal plasma has a high glycoprotein content. A thin muscle layer is basal to the epithelial cells. Both apyrene and eupyrene sperm undergo some development in the vasa deferentia. The epithelial cells, muscle, and stored sperm all undergo extensive changes with age.
地中海粉螟（Anagasta kuehniella (Zeller)）的每条输精管由紧接睾丸下方的一小段肿胀部分、形成精囊的另一段肿胀部分以及排入双射精管一支的细长下段组成。三种类型的上皮细胞依次出现。吞噬来自睾丸碎片的吞噬细胞构成第一个肿胀部分的前三分之二。高柱状分泌细胞构成第一个肿胀区域的远端三分之一并延伸至精囊。分泌细胞围绕着一个狭缝状的管腔，似乎在两个肿胀区域之间起到瓣膜的作用。许多被膜包裹的分泌颗粒储存在细胞顶端，并与少量周围的细胞质一起释放到管腔中。这些颗粒在雄性生殖道中保持完整。第二种类型的分泌细胞构成精囊壁和输精管下段。这些细胞产生分泌颗粒，其内容物会通过精液分散开来。磷钨酸 - 铬酸染色表明精浆中糖蛋白含量很高。上皮细胞下方有一层薄的肌肉层。无核精子和有核精子在输精管中都会经历一些发育过程。上皮细胞、肌肉和储存的精子都会随着年龄发生广泛变化。
