Sarcoplasmic reticulum lies Sarcoplasmic reticulum lies between fascicles but outside fibers. between myofibrils but in fibers. between fibers but in myofilaments. between muscles but in myofilaments.

Between myofibrils, but in fibers.

Explanation:

Sarcoplasmic reticulum lies between myofibrils, but in fibers. Sarcoplasmic reticulum is a membrane that is found in muscle cells. It is used to store calcium. Therefore, this is necessary for the human body functions.