Assertion: thymus's structure | /r/HasProperty | seminiferous tubules
Facets:
Source sentences:
text: Structures: seminiferous tubules for producing semen in each testicle, with attached duct (epididymis) to further concentrate and transport semen; follicles mature, erupt to produce one egg (ovum) per heat cycle, then regress; egg passes through the fallopian tubes to the uterus.