Question

brief explanation on vagina in reproductive system... plz.. did not understand anything..

Answer 1

after complete devlopment of the young one, with the rithmeic contraction of the uterus the young one is born out through the vaginal passage also called birth canal. 
                                                  OR

vagina recieves the penis for putting sperm into women"s body. It is also called birth canal because it is through this passage the baby born after the completiton of development inside the uterus of mother

Answer 2

vagina is the passage through which sperm enters and it is also known as birth canal