seminiferous tubule any of the numerous long convoluted tubules in the testis which are the sites where spermatozoa mature
cobblers a man's testicles (from Cockney rhyming slang: cobbler's awl rhymes with ball)
undescended testicle,
undescended testis a testis that fails to move into the scrotum as the male fetus develops; "undescended testicles have an increased risk for cancer"
epididymis a convoluted tubule in each testis; carries sperm to vas deferens
rete testis network of tubules carrying sperm from the seminiferous tubules to the vasa efferentia