the hymen
hymen
Your menstrual blood flows out of your uterus through your cervix, and then out of your vagina. This is how things work for all women. Your hymen is simply a fold of mucosa membrane which partially covers the opening of your vagina. All women are born with a hymen, but in some it is so small as to be virtually undetectable.
Well, a hymen is usually a small fold of tissue that partly covers the entrance to the vagina of a virgin that makes the vagina look smaller (contracted). As much as it is right outside the vagina, it is not a specific thing that you can point out. The only way to find out is when the opening is too tight as compared to someone who isn't a virgin.
Vocal fold (true vocal)
rugae
Pleura.
Cristae (singular; crista)
The double baglike fold of serous membrane which incloses the heart.
fold
Lingual frenum
ENDOCYTOSIS
Vocal cord (true)