A<unk>  is the basic unit of a muscle's cross-striated myofibril.<unk> s are multi-protein complexes composed of three different filament systems.
The thick filament system is composed of myosin protein which is connected from the M-line to the Z-disc by Titin
The thin filaments are assembled by actin monomers bound to Nebulin.
Nebulin and Titin gives stability and structure to the<unk> .
A muscle cell, from a biceps, may contain 100,000<unk> s. The myofibrils of smooth muscle cells are not arranged into<unk> s.
Sarcomere
Segrosome
Ribozyme
Centromere
Telomere
Ribosomal RNA
Cytome
Ovacome