part of start stage end stage testis multi-tissue structure seminiferous tubule Tubules formed by the seminiferous epithelium that contains spermatogenic cyst surrounded by somatic support cells, called Sertoli cells. The lumen of he seminiferous tubules connects to the sperm or efferent duct. zebrafish_anatomy sperm duct seminiferous tubules ZFA:0005879 2017-04-28T11:17:00Z Ceri unknown adult