What is a Vagina?

The vagina is a muscular and elastic tubular structure that serves as a key component of the female reproductive system. It extends from the external genitalia, known as the vulva, to the cervix, which is the lower part of the uterus. The average length of the vagina is approximately 7.5 to 10 centimeters (3 to 4 inches) when not aroused, but it can expand in both length and width during sexual arousal and childbirth.

Functionally, the vagina plays several critical roles. It serves as the passageway for menstrual fluid to exit the body, as well as the birth canal during childbirth. Additionally, it is the receptacle for the penis during sexual intercourse, allowing for the introduction of sperm into the reproductive tract. The vagina also has self-cleaning properties, maintaining a balanced pH level and a healthy environment through the secretion of vaginal fluids.