Final answer:
The uterus is a muscular organ that functions as a nourishing environment for embryos prior to birth. The vagina is a tubular passageway through which the embryo or fetus leaves the mother's body during birth.
Step-by-step explanation:
The uterus is a muscular organ that functions as a nourishing environment for embryos prior to birth. Its average size is approximately 5 cm wide and 7 cm long when a female is not pregnant. The uterus has three sections: the fundus, the body, and the cervix. The contractions of the muscular wall of the uterus help push the offspring out during birth.
The vagina is a tubular passageway through which the embryo or fetus leaves the mother's body during birth. It is also where the male deposits sperm during mating.