part of part of in taxon channel for channels_from channels_into sperm Vertebrata <vertebrates> tube male reproductive system epididymis rete testis duct of male reproductive system efferent duct UBERON:0006946 efferent ductule FMA:19081 EMAPA:18993 Wikipedia:Efferent_ducts NCIT:C32492 AAO:0010532 The efferent ducts (or efferent ductules or ductuli efferentes) connect the rete testis with the initial section of the epididymis. The ductuli are unilaminar and composed of columnar ciliated and non-ciliated (absorptive) cells. The ciliated cells serve to stir the luminal fluids, possibly to help ensure homogeneous absorption of water from the fluid produced by the testis, which results in an increase in the concentration of luminal sperm. The epithelium is surrounded by a band of smooth muscle that helps to propel the sperm toward the epididymis. seminal duct vasa efferentia MA:0000398 male genital duct