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Vaginal function
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The vagina serves as a shared passage for several processes. Menstrual flow leaves the uterus through it, it receives semen during sexual intercourse, and it forms part of the birth canal.
The vagina also contributes to lubrication even though it has no glands of its own. Some fluid crosses its wall from blood vessels and reaches the surface. This passage does not have a single job: it connects structures and allows fluid or a fetus to pass, depending on the context.
In brief
The vagina serves as a canal for menstrual fluid and tissue leaving the uterine cavity and also serves as the birth canal.
It also receives semen during sexual intercourse and, because it has no glands of its own, contributes to lubrication through fluid that passes across its wall.
Sources (1)
- NCBI Bookshelf / StatPearlsPhysiology, Vaginal Structure and Function
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