Difference between striated, unstriated and cardiac muscles Striated muscles Unstriated muscles Cardiac musclesStructure Also known as skeletal muscles, they are striated, tubular, multinucleated, unbranched and tubular fibres. Also known as smooth muscles, they are non-striated, spindle shaped, uninucleated fibres. Cardiac muscles are striated, tubular, uninucleated, branched fibres. LocationThey are found attached to skeleton.They are found in walls of internal organs.They are found in walls of heart.