Myofibrils (Gr. Mis - Muscle, Lat. Fibrilla - Fiber)

Myofibrils (Gr. Mis - Muscle, Lat. Fibrilla - Fiber)

Myofibrils are microscopic contractile fibers consisting of the proteins myosin and actin.

Myofibrils are the main structural components of muscle cells. They are responsible for contracting muscles when they are activated. Myofibrils are composed of repeating sarcomeres, which in turn are composed of thick myosin and thin actin filaments. The interaction of these protein strands ensures the contraction of myofibrils during muscle contraction.

Thus, myofibrils, due to their unique molecular structure, perform a critical function in providing the ability of muscles to contract and relax. Their structure and work are the fundamental basis for the functioning of muscle tissue.