What contains a sarcolemma sarcoplasm myofilaments and myofibrils?

A muscle fiber contains a sarcolemma, sarcoplasm, myofilaments, and myofibrils. The sarcolemma is the cell membrane that surrounds the muscle fiber, while the sarcoplasm is the cytoplasm of the muscle cell, containing various organelles and substrates for energy production. Myofilaments, which are composed of actin and myosin, are organized into myofibrils that facilitate muscle contraction. Together, these components enable the muscle fiber to function effectively during contraction and relaxation.