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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.

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Answer:

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.