The cervix or cervix uteri Latin, 'neck of the uterus' is the lower part of the uterus in the human female reproductive system. The narrow, central cervical canal runs along its entire length, connecting the uterine cavity and the lumen of the vagina. The opening into the uterus is called the internal os , and the opening into the vagina is called the external os. The lower part of the cervix, known as the vaginal portion of the cervix or ectocervix , bulges into the top of the vagina. The cervix has been documented anatomically since at least the time of Hippocrates , over 2, years ago. The cervical canal is a passage through which sperm must travel to fertilize an egg cell after sexual intercourse.
The Female Reproductive System | Boundless Anatomy and Physiology
Clue is on a mission to help you understand your body, periods, ovulation, and so much more. Start tracking today. In a non-aroused state, the walls of the vagina are collapsed against each other. The vagina changes: during sex, throughout the menstrual cycle, and with age and different life stages. People often use the term vagina to refer to the entire female genital region between the legs—but this is incorrect. The vulva is the correct name for the external parts of the female genitalia.
The vulva includes the:. The vagina is a muscular canal lined with nerves and mucus membranes. It connects the uterus and cervix to the outside of the body, allowing for menstruation, intercourse, and childbirth. The vaginal opening, also called the vaginal vestibule or introitus , is the opening into the vagina. The opening is where menstrual blood leaves the body.
What exactly IS a vagina? Well, it's the muscular tube that extends from the cervix to the vulva. It's a surprisingly common question for such a simple definition, but that quick sentence might not answer all your questions.