: The mature vagina maintains a slightly acidic pH (around 4.5) to support healthy bacteria ( flora ) and protect against infections. Key Internal Structures
: The inner walls are not smooth; they are lined with ridges called rugae . These folds allow the vagina to stretch significantly—like an accordion—during intercourse or childbirth. inside mature vagina
Beyond the muscular canal, several internal landmarks play vital roles in physical sensation and health: Female Reproductive System | Nemours KidsHealth : The mature vagina maintains a slightly acidic pH (around 4