The vaginal opening, also known as the vaginal orifice, is the external part of the vagina, which is a muscular tube that connects the external genitals to the uterus. It is located between the urethra and the anus and serves multiple functions, including the passage for menstrual fluid, sexual intercourse, and childbirth. The vaginal opening is surrounded by the labia, which are folds of skin that protect the internal structures. The size and shape of the vaginal opening can vary among individuals and may change due to factors such as age, hormonal changes, and childbirth.