mucus-secreting membrane lining all body cavities or passages that communicate with the exterior

外部と通じるすべての体腔や通路を覆う粘液を分泌する膜

hymen that is completely closed so that menstrual blood cannot flow out

月経血が流出できないほど完全に閉じた処女膜

the lower part of the female reproductive tract; a moist canal in female mammals extending from the labia minora to the uterus

女性の生殖器系の下部。女性哺乳類において、小陰唇から子宮まで伸びる湿った管。