Answer:
The correct answer is - myofibril.
Explanation:
A myofibril or muscle fibril is a unit of the muscle cell. It is a rod-like muscle cell. Myofibril chains are composed of the tubular cells called myocytes. These are made up of several subunits called sarcomere.
Myofibrils are long filamentous that run parallel to each other to form muscle fibers.
Thus, the correct answer is - myofibrils.
