*** Merges with the adventitial layers of the [[Urinary_Bladder_-_Anatomy_%26_Physiology|bladder]] anteriorly and [[Rectum_-_Anatomy_%26_Physiology|rectum]] posteriorly.
*** Merges with the adventitial layers of the [[Urinary_Bladder_-_Anatomy_%26_Physiology|bladder]] anteriorly and [[Rectum_-_Anatomy_%26_Physiology|rectum]] posteriorly.
* This combination of eleastic fibres and muscular layers allows the massive distension that occurs during parturition.
* This combination of eleastic fibres and muscular layers allows the massive distension that occurs during parturition.
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* After coitus, contraction of the smooth muscle layer ensures that the pool of semen remains within the cervical region.
+
* After [[Reproductive_Behaviour_-_Copulatory_Behaviour_-_Anatomy_%26_Physiology|coitus]], contraction of the smooth muscle layer ensures that the pool of semen remains within the cervical region.
* When relaxed, the vaginal wall collapses to obliterate the lumen and the vaginal epithelium is thrown into folds.
* When relaxed, the vaginal wall collapses to obliterate the lumen and the vaginal epithelium is thrown into folds.