Body movement is caused by muscle, a tissue that may contract. There are 3 main types: musculus, swish muscle, and heart muscle. Most muscle is formed of elongated cells known as "muscles fibers".
Involuntary muscles:
Smooth muscle and heart muscle are involuntary they work mechanically, while not our aware management. swish muscle is found within the walls of the intestines, stomach, esophagus, and different organs. It contracts slowly and rhythmically to push food through the system. heart muscle is found within the heart and works endlessly while not exhausting.
Working of muscles with bones :
Skeletal muscles move bones by actuation on them. as a result of we have a tendency to management this movement, they're known as voluntary muscles. Muscles will pull however not push, therefore skeletal muscles are typically organized in pairs that pull bones in opposite directions.