Changes

* The wall consists of:

* The wall consists of:

** Mucosal layer lined by stratified squamous epithelium

** Mucosal layer lined by stratified squamous epithelium

** Layer of smooth muscle

** Layer of [[Muscles_-_Anatomy_%26_Physiology#Smooth_Muscle|smooth muscle]]

*** Inner circular and outer longitudinal layers

*** Inner circular and outer longitudinal layers

** Outer layer of adventitia

** Outer layer of adventitia

** Not lined by Mesothelium

** Not lined by Mesothelium

*** 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 elastic fibres and muscular layers allows the massive distension that occurs during [[Reproductive_System_-_Anatomy_%26_Physiology#Parturition|parturition]].

* This combination of elastic fibres and [[Muscles_-_Anatomy_%26_Physiology#Smooth_Muscle|muscular]] layers allows the massive distension that occurs during [[Reproductive_System_-_Anatomy_%26_Physiology#Parturition|parturition]].

* 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.

* 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.