sarcoplasmic reticulum

n.
The form of endoplasmic reticulum found in striated muscle fibers.

System of membranous tubules surrounding each muscle fibre. The sarcoplasmic reticulum transmits the contractile impulse to all parts of a muscle fibre. It does this by releasing and then sequestering calcium ions that are essential for muscle contraction. See also sliding-filament theory.

n.

The endoplasmic reticulum found in striated muscle fibers.