APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -Smooth muscle differs from skeletal muscle in function. Unlike skeletal muscle, smooth muscle is capable of maintaining tone for extended periods and often contracts involuntarily. At a cellular level, smooth muscle can be described as an involuntary, non-striated muscle .

Detailed explanation-2: -Cardiac muscle and smooth muscle that line the internal organs like the intestinal tract, blood vessels, urogenital tract, respiratory tract, etc. are involuntary muscles.