Skip to Content
Medical Term:

circular layer of muscle coat of small intestine


the inner layer of smooth (involuntary) muscle of the muscle coat (muscularis externa) of the small intestine in which the muscle fibers encircle the lumen; it is claimed by some investigators that the orientation of the muscle fibers is a tight spiral or helix rather than being truly circular.

Synonym(s): stratum circulare tunicae muscularis intestini tenuisTA, short pitch helicoidal layer, stratum helicoidale brevis gradus

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.