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.
Skeletal Muscles. Skeletal muscles are types of muscles which are most abundant and are found attached to skeleton. They are also called striped, striated, somatic, or voluntary muscles. They exhibit cross-striations under microscope, and are considered to be the best differentiated form of muscle.isceral muscle is found inside of organs like the stomach, intestines, and blood vessels. Visceral muscles are weakest of all the muscles. Their main function is to move substances through the organ. This type of muscles are also called plain, unstriped, non-striated, visceral, or involuntary muscles.