Smooth muscle: Inside of organs like the intestines, stomach, and bladder, you will find smooth muscles. You will also find smooth muscles in various systems like the: ...

The smooth muscles of the lower esophageal sphincter, organized as clasp and sling fibers 3 (Figure 1A), have different physiological properties and neural innervation. 4,5 Three-dimensional ...

A stomach cramp is a sudden, tight feeling in the muscles of your belly. Learn what causes stomach cramps, how to treat them, and when you should see a doctor.

Larsen, B., et al. (2024). Associations of Abdominal Muscle Density and Area and Incident Cardiovascular Disease, Coronary Heart Disease, and Stroke: The Multi‐Ethnic Study of Atherosclerosis.