Essay On The Muscular System

There are 11 organ systems in the human body and each system has its own function. The Muscular system provides support and protection to other organs and tissue. It also helps in body movement and maintaining heat and body temperature. The digital source by Emma Bryce on “How your muscular system works” explains the types of muscles in the involved in the movement of body. The source expands on three major groups of muscular systems. They are skeletal muscle, Cardiac muscle and smooth muscle. Skeletal muscles are made up of muscle tissue, connective tissue, nerves and blood vessels that is attached to tendons and bones. Cardiac muscles are small with short wide T-tubules and is only found in heart. Smooth muscles are long, slender and spindle shaped with no T tubules, myofibrils or sarcomeres that arrange the blood vessels in some organs. All these three types of muscles are grouped together with fibers that

They can be the shortening and lengthening of muscle fiber such as bending of biceps, and the contraction that maintain the physical stability such as sitting up or standing up. The source also further explains how the movement of skeletal muscle can be controlled. Since the skeletal muscle are attached to somatic nervous system, the movement of skeletal muscles are controlled voluntarily. The skeletal muscles consists of slow twitch and fast twitch muscle fibers. On one hand, slow twitch fiber uses energy slowly and helps the muscles to act of the long time. e.g., back muscle that helps to maintain posture for a long time. On the other hand, fast twitch muscle fibers uses the energy fast. e.g., the leg of a sprinter while jogging. The source also highlighted the cardiac and smooth muscle for being involuntarily controlled. Since cardiac and smooth muscle are attached to autonomic nervous system, they control subconscious actions such as heart beat and food digestion in