The introitus is sometimes partly covered by a membrane called the hymen.
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The fetal head then continues descent into the pelvis, below the pubic arch and out through the vaginal introitus.
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One example is a slip while riding a bicycle may on occasion result in the bicycle's saddle-horn entering the introitus just far enough to break the hymen.
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A slip while riding a bicycle may on occasion result in the bicycle's saddle-horn entering the introitus just far enough to break the hymen.
From the en.wikipedia.org
Healing takes place by primary intention, and, as a result, the introitus is obliterated by a drum of skin extending across the orifice except for a small hole.
From the en.wikipedia.org
More examples
Entrance or opening to a hollow organ or tube (especially the vaginal opening); "the introitus of the vagina"
The entrance to a hollow organ or canal; often specifically the entrance to the vagina; A piece of music played before a mass; a musical introduction of any sort; Alternative spelling of introit
Latin intro = within, and ire = to go, hence, an orifice or point of entry to a cavity or space.
(in anatomy) an entrance into a hollow organ or cavity