Question

differences between fibers of involuntary and voluntory cardiac muscles

Answer 1

Voluntary muscles include the muscles attached to the skeleton.
The involuntary muscles include smooth and cardiac muscles.
Smooth muscles line the organs, while cardiac muscle forms the heart.
Voluntary muscle is under conscious control, and thus is controlled by the somatic nervous system while the involuntary muscle is under unconscious control, controlled by the autonomic nervous system.
Voluntary muscle cells are long, multinucleated cells that contain sarcomeres and are arranged into bundles.
Involuntary muscle cells are striated and branched in the case of cardiac muscle.
The other type of involuntary muscle, smooth muscle is not striated and consists of spindle-shaped short cells.
There are different types of smooth muscles and skeletal muscles.
The structure of voluntary and involuntary muscles matches their functions in the human body.