Zoology - Structural Organisation in Animals Question with Solution | TestHub

Myofibrils are assembled of repeated structures called sarcomeres (the smallest functional unit of muscle fibre). However, a single muscle cell has many myofibril (muscle fibre) units. Each sarcomere is composed of actin (called thin) and myosin (called thick) filaments, arranged in a precise order, and protein complexes that support the filament structures.