Striated Muscles

Striated muscles’ tissue have repeating functional units called sarcomeres, seen under a microscope as distinctive alternating light and dark bands (striations). They’re responsible for converting chemical energy into physical work and are vital for functions such as movement, posture, and pumping blood. Two striated and one smooth muscle tissues: 

• Skeletal muscles are attached to bones by tendons and allow for voluntary movements (walking, chewing, posture). The muscle cells are long, cylindrical, and have multiple nuclei located at the periphery. They can contract rapidly and powerfully but also tire easily.
• Cardiac specialized muscle tissue is found exclusively in the walls of the heart. Involuntary contractions rhythmically and continuously pump blood throughout the body without fatigue. Cardiac muscle cells are short, branched fibers and contain a single, central nucleus, connecting to one another via specialized structures called intercalated discs. 
• Smooth muscle tissue lines the walls of hollow internal organs (intestines, blood vessels), under involuntary control, aren’t striated because its protein filaments are not arranged in the regular, repeating pattern of sarcomeres