Muscular System pt. 1Version en ligne Muscular System activity part 1 par Katie Ivester 1 Cardiac Muscle 2 Skeletal Muscle 3 Smooth Muscle Found only in the heart Striated cells Involuntary muscle covers the bony skeleton longest muscle cells contain striations voluntary muscle found on the walls of hollow organs forces fluids through internal body channels Visceral, non-striated, and involuntary