Striated muscle tissue
Striated Muscle Tissue
Striated muscle tissue (pronunciation: /straɪˈeɪtɪd ˈmʌsl ˈtɪʃuː/) is a type of muscle tissue that is marked by transverse dark and light bands, is made up of elongated, usually multinucleated fibers, and includes skeletal and most cardiac muscle.
Etymology
The term "striated" is derived from the Latin word "stria" which means "groove" or "channel", and "muscle tissue" is derived from the Latin "musculus" meaning "little mouse", and "tissue" from the French "tissu" meaning "a weave". The term reflects the striped appearance of this type of muscle tissue under a microscope.
Types of Striated Muscle Tissue
Striated muscle tissue can be further classified into two types:
- Skeletal muscle: These are the muscles that are attached to the bones and are responsible for voluntary movements of the body. They are striated and multinucleated.
- Cardiac muscle: This is the muscle tissue found in the heart. It is also striated, but unlike skeletal muscle, it is not under voluntary control.
Related Terms
- Myofibril: The basic rod-like unit of a muscle cell. Myofibrils are composed of long proteins such as actin, myosin, and titin, and other proteins that hold them together.
- Sarcomere: The basic unit of a muscle's cross-striated myofibril. Sarcomeres are multi-protein complexes that give the muscle its striated appearance.
- Actin: A protein that forms (together with myosin) the contractile filaments of muscle cells, and is also involved in motion in other types of cells.
- Myosin: A type of motor protein that interacts with actin to cause muscle contraction.
External links
- Medical encyclopedia article on Striated muscle tissue
- Wikipedia's article - Striated muscle tissue
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