∙ 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.