The muscular coat (muscular layer, muscular fibers, muscularis propria, muscularis externa) is a region of muscle in many organs in the vertebrate body, adjacent to the mucous membrane. It is responsible for gut movement such as peristalsis.
It usually has two distinct layers of smooth muscle:
However, there are some exceptions to this pattern.
The inner layer of the muscularis externa forms a sphincter at two locations of the alimentary canal:
Wall of the ureter.
Layers of stomach wall.
Section of the human esophagus. Moderately magnified.
Section of duodenum of cat. X 60.
Vertical section of bladder wall.
hi is organ doesnt do anything helpful
Mesothelium · Serosa / Adventitia · Muscularis externa (outer and inner) · Submucosa · Mucosa (Muscularis mucosa · Lamina propria · Epithelium) · Lumen
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
