The basic unit of a muscle’s cross-striated myofibril.
The functional unit (contractile unit) of muscle fibers.
Contractile segment of skeletal muscle tissue.
One of the basic contractile units of which striated muscle fibers are composed.
The unit of contraction of the myofibrils of a muscle cell, made of protein filaments arranged between two Z disks. Thick filaments are made primarily of myosin; thin filaments are made of actin, troponin, and tropomyosin. Desmin, myomesin, nebulin, and titin are stabilizing proteins.