The vagina is a muscular tube that connects the external genitals to the uterus. It serves multiple functions, including the passage for menstrual fluid, the birth canal during childbirth, and the receptacle for the penis during sexual intercourse. The vaginal walls are elastic and lined with mucous membranes, which help maintain moisture and protect against infections. Surrounding the vagina are several important structures, including the labia (the outer and inner folds of skin), the clitoris (a sensitive organ involved in sexual arousal), and the hymen (a thin membrane that partially covers the vaginal opening in some individuals). These components contribute to the overall function and health of the female reproductive system.