This site is intended for healthcare professionals

Go to /sign-in page

You can view 5 more pages before signing in

Muscular layer

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

The muscular layer of the oesophagus is divided into two parts:

  • outer longitudinal layer
  • inner circular layer

In the upper third, skeletal muscle predominates. In the inferior two thirds, smooth muscle is more common. There is a transition between the two sets of fibres.

Functionally, the skeletal muscle may be present superiorly to increases the transit rate of a food bolus through this section. This permits more rapid reopening of the larynx so that breathing may be resumed.

There is no anatomical thickening of the muscular layers within the inferior oesophageal wall i.e. there is no true intramural sphincter.

Related pages

Create an account to add page annotations

Annotations allow you to add information to this page that would be handy to have on hand during a consultation. E.g. a website or number. This information will always show when you visit this page.