Internal Anatomy

Written by Jen Bell

  |  Reviewed by Staci Tanouye, M.D.

This diagram shows the inner workings of the internal anatomy and reproductive system for people with a uterus.

  • Vagina: The vagina is the muscular, elastic canal that you can touch and feel. Also known as the birth canal, the top of the canal joins the cervix (the lower part of the uterus) and ends with your vaginal opening- the place where you bleed during your period and put internal period products.
  • Uterus (womb): The uterus is a hollow, pear-shaped organ that is the home to a developing fetus during pregnancy. The uterus is divided into two parts: the cervix, which is the lower part that opens into the vagina, and the main body of the uterus, called the corpus. When pregnant, the corpus expands to hold a developing baby.
  • Cervix: The lower part of the uterus that connects the uterus and vagina. A channel through the cervix allows sperm to enter and menstrual blood to exit. The cervix is located at the bottom of the uterus and is a protective gateway that connects your uterus and vagina. It allows sperm to enter, menstrual blood to exit, and is where your cervical discharge comes from.
  • Ovaries: The ovaries are small, oval-shaped glands located on either side of the uterus. The ovaries secrete hormones, protect the eggs, and release eggs for possible fertilization.
  • Fallopian tubes: These are narrow tubes that are attached to the upper part of the uterus and serve as passageways for the ova (egg cells) to travel from the ovaries to the uterus and are where fertilization by a sperm cell can happen.