Muscle tissue is composed mainly of muscle cells, often known as muscle fibres
Muscle cells have the characteristic of being able to contract, this is achieved by the interaction between two main proteins, actin and myosin
Muscle cells are usually long thin cells with the contractile units in the cells orientated in such a way that on contraction the long axis of the cell is shortened
Muscle cells are of three types:
Smooth muscle
Cardiac muscle
Skeletal muscle
Usually, muscle cells are found in bundles which are held together by connective tissue
This connective tissue is important in maintaining the organisation of the bundles of muscle cells, which in turn will play an important role in supporting the function of each bundle of muscle cells in the body
The connective tissue also supports the blood vessels and nerves which provide nutrition and control over the muscle