What Are Smooth Muscle Cells?

Smooth Muscle Cells.

Smooth muscle cells (SMCs) are involuntary, non-striated muscle cells that line the insides of hollow organs such as arteries, lungs, bladder, the digestive system, and the reproductive system.

What are smooth muscle cells called?

Smooth muscle, also called involuntary muscle, muscle that shows no cross stripes under microscopic magnification. It consists of narrow spindle-shaped cells with a single, centrally located nucleus. Smooth muscle tissue, unlike striated muscle, contracts slowly and automatically.

What is smooth muscle tissue?

Smooth muscle: Along with skeletal and cardiac muscle, one of the types of muscle tissue in the body. Smooth muscle generally forms the supporting tissue of blood vessels and hollow internal organs, such as the stomach, intestine, and bladder.

What does smooth muscle cells look like?

Compared to skeletal muscle, smooth muscle cells are small. They are spindle shaped and have no striations. Instead, they have bundles of thin and thick filaments.

What shape are smooth muscle cells?

Smooth muscle fibers are long, spindle-shaped (fusiform) cells. Note the single and centrally placed nucleus in each smooth muscle cell. The absence of striation is also characteristic of the smooth muscle cells.