The vagina is a thin-walled tube which lies between the bladder and rectum. It is often called the birth canal, since it provides the passageway of delivery of an infant.
Review Date 9/28/2017
Updated by: John D. Jacobson, MD, Professor of Obstetrics and Gynecology, Loma Linda University School of Medicine, Loma Linda Center for Fertility, Loma Linda, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.