Connection lost. Please refresh the page.
Online
Get help How to study Login Register
Ready to learn?
Pick your favorite study tool

Myometrium

Recommended video: Uterus [06:13]
Anatomy and function of the uterus.

The myometrium is a thick muscular layer that is continuous with the muscular layer of the uterus and vagina. It is the thickest layer of the uterine wall. The myometrium is composed of three layers of smooth muscle: the inner, middle and outer layers. 

The inner and outer layers have smooth muscle bundles that lie longitudinally and parallel or to the long axis of the uterus.

The middle layer is comprised of large blood vessels and lymphatics and is also known as the stratum vasculare. There are also muscle fibers arranged in a concentric or spiral pattern in this layer.

All three layers of the myometrium work together during uterine contraction to expel the contents of the uterine lumen. In the non-pregnant uterus, the smooth muscle cells measure approximately 50 micrometers in length. However, during pregnancy, the uterus experiences significant enlargement. This growth is mainly due to the hypertrophy of existing smooth muscle cells, which can reach lengths of over 500 micrometers.

Terminology: English and latin: myometrium
Location: Thickest layer of the uterine wall
Function: Composed of smooth muscle, therefore works with other layers of the uterine wall for uterine contraction.

Learn more about the uterus and the other uterine walls in this study unit: 

Myometrium: want to learn more about it?

Our engaging videos, interactive quizzes, in-depth articles and HD atlas are here to get you top results faster.

What do you prefer to learn with?

“I would honestly say that Kenhub cut my study time in half.” – Read more.

Kim Bengochea, Regis University, Denver
© Unless stated otherwise, all content, including illustrations are exclusive property of Kenhub GmbH, and are protected by German and international copyright laws. All rights reserved.

Register now and grab your free ultimate anatomy study guide!