Vagina

4. Vagina : It is a tubular female copulatory organ, 7–9 cm in length, lying between the cervix and the vestibule. Its wall has three layers: an inner mucosal lining, a middle muscular layer, and an outer adventitia layer. The mucosal epithelium is stratified and non-keratinised, and it stores glycogen; the vagina itself has no glands of its own, but it receives the mucus secretion produced by the cervix. The opening of the vagina into the vestibule is called the vaginal orifice, and this opening is partly covered by a fold of mucous membrane called the hymen. The vagina serves two fun …