stomach smooth muscle circular layer cell
stomach smooth muscle circular layer cell
A smooth muscle cell located in the middle layer of the muscularis externa of the stomach wall. This cell is arranged concentrically with the stomach's longitudinal axis, forming a continuous sheet of contractile tissue. It is fusiform in shape, containing actin and myosin filaments that enable contraction without striations. This cell contributes to the mechanical digestion and movement of food within the stomach through coordinated contractions, and plays a role in forming the pyloric sphincter in the pyloric region.