MUSCLE PHYSIOLOGY

Detailed explanation-1: -Cardiac muscle makes up the thick middle layer of the heart and is surrounded by a thin outer layer called the epicardium or visceral pericardium and an inner endocardium.

Detailed explanation-2: -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-3: -Cardiac muscles are a type of specialized, striated muscle found only in the heart. They are under the control of the autonomic nervous system, which means they are involuntary and work autonomously. They also contain blood vessels that supply nutrients to cardiac muscle tissue and remove waste products.