1. It is a hollow muscular organ that serves as the site of egg implantation after fertilization and where the egg develops. 2. Each month, the female reproductive system prepares for a possible pregnancy by releasing mature egg cells. 3. It is a muscular canal that leads from the outside of the body. Sperm cells enter through the vagina during mating. 4. It is a narrow portion at the bottom of the uterus that provides opening to the uterus from the vagina. 5. It serves as the passageway for the ovum from the ovary to the uterus. This is the site of fertilization.