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Cancer of the Uterus

  • Posted: 10/25/2010

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The Uterus

The uterus is part of a woman’s reproductive system. It’s a hollow organ in the pelvis.

The uterus has three parts:

  • Top: The top (fundus) of your uterus is shaped like a dome. From the top of your uterus, the fallopian tubes extend to the ovaries.
  • Middle: The middle part of your uterus is the body (corpus). This is where a baby grows.
  • Bottom: The narrow, lower part of your uterus is the cervix. The cervix is a passageway to the vagina.

The wall of the uterus has two layers of tissue:

  • Inner layer: The inner layer (lining) of the uterus is the endometrium. In women of childbearing age, the lining grows and thickens each month to prepare for pregnancy. If a woman does not become pregnant, the thick, bloody lining flows out of the body. This flow is a menstrual period.
  • Outer layer: The outer layer of muscle tissue is the myometrium.
This picture shows the uterus and nearby tissues.
This picture shows the uterus and nearby tissues.

This text may be reproduced or reused freely. Please credit the National Cancer Institute as the source. Any graphics may be owned by the artist or publisher who created them, and permission may be needed for their reuse.