Smooth muscles are found in inner organs while cardiac muscles are found only in the heart.
• Cardiac muscles are striated, but smooth muscles are non-striated.
• Each cardiac muscle cell has one or more nuclei, but the smooth muscle cells are single nucleated.
• Cardiac muscle cells are often branched, but smooth cells are non-branched.
• Smooth muscle cells are fusiform-shaped, but cardiac muscle cells are long and cylindrical.
Smooth muscle are long while cardiac muscles are short.
Smooth muscle get tired soon while cardiac muscles do not get tired soon.