Cardiac Muscles

Cardiac muscles exhibit cross-banded appearance under the microscope similar to the skeletal muscles. Therefore, these are also called striated muscles, but the striations are not aligned as found in the skeletal muscles. Therefore, the striated appearance is less distinct in them. These also contain actin and myosin filaments. Cardiac muscle fibres are smaller it size than the skeletal muscle fibres. They are mononucleated but contain abundant mitochondria. Sarcoplasmic reticulum and T- tubules may be well developed or absent

Figure: Cardiac Muscles