Saturday, April 18, 2009

Skeletal Muscle

Skeletal muscle is voluntary muscle which consists of elongated, multinucleated, and transversely striated muscle cells. Skeletal muscle cells are called fibers, which group together into bundles called fascicles, which are wrapped in the epimysium to form a skeletal muscle such as the deltoid, or one portion of the biceps.

When skeletal muscle contracts, it effects skeletal movement. The contraction is caused by nervous signals sent by either the brain cortex or the spinal cord through the nerves.