Approximately half your body weight is muscle tissue. There are three types of muscles, which are cardiac, skeletal and smooth muscles. Cardiac muscle appears striated. It is located in the heart walls and moves involuntarily. Skeletal muscle is attached to the bones and is under voluntary control. Smooth muscle appears spindle-shaped, and is located in the walls of hollow organs like the uterus, intestine, bladder, blood vessels -except the heart. This musclealso moves involuntarily.Muscular System Functions1. MobilityThe central nervous system controls the skeletal muscle fibers for voluntary movement, by means of the muscles' contraction and relaxation. Actions like running, jumping, walking, dancing or chewing among others are done with the help of skeletal muscles.2. CommunicationThe muscles we need for speaking and writing are also skeletal muscles. They can be controlled by our central nervous system which tells thosemuscles what to do and how to do it. The skeletal muscles make...
