MICROANATOMY

Detailed explanation-1: -Cardiac muscle cells are located in the walls of the heart, appear striped (striated), and are under involuntary control. Smooth muscle fibers are located in walls of hollow visceral organs (such as the liver, pancreas, and intestines), except the heart, appear spindle-shaped, and are also under involuntary control.

Detailed explanation-2: -Both smooth and cardiac muscle are uninucleated (both having single nucleus). Smooth muscle tissue has unbranched fibres, while cardiac has branched fibres. Both smooth and cardiac muscle tissue are involuntary in nature. Smooth muscle is spindle-shaped while cardiac is cylindrical in shape.

Detailed explanation-3: -Cardiac muscle, like skeletal muscle, is made up of sarcomeres that allow for contractility. However, unlike skeletal muscle, cardiac muscle is under involuntary control. The cardiac muscle is responsible for the contractility of the heart and, therefore, the pumping action.

Detailed explanation-4: -Involuntary muscle is a muscle that contracts without conscious control. Examples include the smooth and cardiac muscles. The smooth muscles, which are muscles lacking striations when viewed under a microscope. This is why involuntary muscles are sometimes called non-striated or un-striped muscles.

Detailed explanation-5: -The actions of involuntary muscles are mainly controlled by the autonomic nervous system in the body. These involuntary muscles include smooth muscles and cardiac muscles.