Final answer:
The uterus contracts to expel the fetus, the cervix dilates to accommodate the baby's passage, and the vagina stretches and expands during the baby's transit in childbirth.
Step-by-step explanation:
The female reproductive system has various structures that play crucial roles during childbirth. When we match each structure with its function during the process of giving birth, we get the following:
- Uterus: Muscle contracts to expel fetus.
- Cervix: Fibrous tissue opens to accommodate fetus's passage into the birth canal.
- Vagina: Muscle expands as fetus moves through birth canal and stretches as fetal head emerges.
The uterus is a muscular organ that contracts during childbirth to push the fetus out. The cervix, which is at the lower part of the uterus, dilates to allow the baby to pass into the vagina, also known as the birth canal. The vagina is the muscular canal that stretches and expands to accommodate the passing of the baby during childbirth.