Answer:
The diagram is showing structure of muscle.
Muscles are responsible for contraction and expansion during the body movement. Each muscle is consist of several other fibers such as fasicle, muscle fiber, myofilament and microfibril.
As shown in the diagram, muscles carry fasicles, which are which is type of connective tissues. Fasicles then comprise of bundle of muscle fibers. Muscle fibers carry proteins called myofilamentand myyofilament carry microfibrils.