we are speaking english in this title

The vagina (from Latin vagĭna, literally "sheath" or "scabbard") is a fibromuscular tubular tract leading from the uterus to the exterior of the body in female placental mammals and marsupials, or to the cloaca in female birds, monotremes, and some reptiles. Female insects and other invertebrates also have a vagina, which is the terminal part of the oviduct. The Latinate plural "vaginae" is rarely used in English.

The word vagina is quite often used colloquially to refer to the vulva or female genitals generally; technically speaking, the vagina is a specific internal structure. In humans, the passage leads from the opening of the vulva to the womb and uterus. It lies midway between the anal tract and the urethra.