reproductive sistem Online version the repructive sistem by JON MIKEL EGUIGUREN MORENO 1 A hollow, muscular, tunnel-like structure that forms the passageway between the cervix and vulva. 2 The pair of organs that store and release egg cells and produce estrogen 3 serves as a passage through which an ovum (egg) is carried from the ovary to the uterus. 4 A pear-shaped hollow organ with muscular walls where a fertilized egg becomes embedded and the fetus develops 5 The part of the uterus that protrudes into the cavity of the vagina.