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Unformatted text preview: enlarged and tend to flatten and spread away from the vaginal orifice . Pressure on the vaginal walls by the bulb of the vestibule increase vaginal lubrication through transudation . The clitoris becomes engorged with blood and becomes erect. During the plateau phase of sexual response, the so-called orgasmic platform is present (due to the constriction of the vaginal canal by the bulb of the vestibule and bulbospongiosus muscle). Orgasm is the rhythmic contraction of the muscular walls of the vagina and uterus. These contractions may aid in keeping semen in the vagina and uterus and help propel sperm towards the egg. Furthermore, the cervix dips into the pool of semen (if present) in the vagina during orgasm. After orgasm, the blood flow, vasocongestion, and erection of the erectile tissues decreases, the vaginal canal returns to its original shape, and the uterus resumes its normal position....
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- Fall '10