A source of confusion that arises pretty often is the distinction between a “vagina” and a “vulva.”
I was reminded of this by a smith’d post about loving your body, which is awesome and you should read it.
You’ll notice it has a picture of some cupcakes with icing in the shape of human female external genitals.
Those human female external genitals are the vulva. The labia majora and minora, the clitoris, the urethral meatus, the vaginal introitus, and the perineum.
The vagina is a potential space, a channel leading to the cervix and then to the uterus. It’s an internal reproductive organ – the reproductive canal or, under some circumstances, the birth canal.
Got that sorted now? Good.