Myofibril is the name given to one of the components
of skeletal muscle cells that are particular to muscle tissue.
These are cylindrical structures that extend along
the complete length of the muscle
fibre/cell (illustrated below).
Above: Diagram of the Structure of a Muscle Fibre, indicating a single
Myofibril (top right).
Each myofibril consists of two types of protein filaments called thick
filaments, and thin
filaments. There are hundreds of myofibrils in each
muscle fibre. Adjacent myofibrils
line up with each other such that the Z-lines (formed from adjacent
Z-discs) of each sarcomere in one myofibril lines up with the Z-lines
of the sarcomeres in