What is the term for the lower part of the birth canal?

The lower part of the birth canal is referred to as the vagina. This is the passageway through which a baby is born and also serves as the site for the entry of the penis during intercourse. It connects the external genitalia to the uterus and plays a crucial role in the reproductive system.

The other terms mentioned refer to different anatomical structures. The uterus is where a fertilized egg develops during pregnancy, while the cervix is the lower portion of the uterus that opens into the vagina. The amniotic sac is a membrane that surrounds the fetus during pregnancy, providing protection and cushioning. Understanding these distinctions is important for grasping female reproductive anatomy and the birth process.