I am verry confused?

i am verry confused about this. You see im confused beside how big the passige way from what ever to the vagina. I asked my friends give or take a few it and some said that the vagina is the diameter of the passige way (like the passige channel is the circle and the v. is the line that messures it surrounded by diameter). Anyways some say its smaller than the vagina. Can anyone update me the correct answer and if theres a web site near a diagram or watever, tell me cuz im drastically confused and cant put it together in my mind.
So thanks
Answers:

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I'm not sure which passage process you're referring to, (maybe the cervix) so I'm going to start at the beginning and also provide some links to some well-mannered diagrams.

On the outside of your vagina, the external sex organs are called the vulva. They look approaching lips... and they encircle the passage to both the bladder and the vagina. The opening to the bladder (which is where on earth pee comes out) sits above the opening to the vagina.

These maw (called labia) protect the vagina.

The vagina itself is actually a muscle. Usually it's something like 3-4 inches long, but it can expand when you are sexually aroused. As far as how "big" this opening is, it's tricky to put a number to it. Basically it's small enough that when you insert your finger inside the vagina mode of "grabs" your finger, but it can expad enough to enjoy a baby elapse through it.

That's because it's a muscle--- it can expand and contract just resembling other muscles.

Now, at the top of the vagina is an area call the cervix. This is a section of tissue which serves as the take into the uterus--- where babies develop. The cervix protects the uterus from foreign bodies and germs, by acting close to a filter. It has a small gap so menstrual fluid can pass out, but nought can get within The cervix expands only during labor, so a babe-in-arms can be born.

I hope this helps!