These are about 8 nm in diameter and, being the thinnest of the cytoskeletal filaments, are also called microfilaments. (In skeletal muscle fibers they are called thin filaments.) Some functions of actin filaments: 1  form a band just beneath the plasma membrane that.  provides mechanical strength to the cell.
Muscle tissue varies with function and location in the body. In mammals the three types are: skeletal or striated muscle; smooth or non-striated muscle; and cardiac muscle, which is sometimes known as semi-striated.n vertebrates, there is a third muscle tissue recognized: 1  Cardiac muscle (myocardium), found only in the heart, is a striated muscle similar in structure to skeletal muscle but not subject to voluntary control.
There are two types of striated muscle: skeletal muscle and cardiac muscle. The skeletal muscles are voluntary muscles which allow for the movement of bones and joints, while cardiac muscles are involuntary, and found only in the heart. striated muscle is a muscle composed of thousands of units known as sarcomeres. Each sarcomere is composed of distinct bands of different material which give the muscle a striped or striated appearance when it is viewed at a high level of magnification.