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.

In arterial and venous blood vessels, smooth muscle cells selectively contract and relax to regulate where more and where less blood flows. They also give the vascular network the strength it ...