Muscles aid in movement, stability, posture, circulation, digestion and breathing; they also assist in the production of heat. Forty percent of the human body is comprised of muscles, and the three main types are skeletal, smooth and cardiac muscles.Continue Reading
The skeletal muscles in the human body cover the skeleton, and they allow people to stand erect, walk, bend and move around. These muscles are controlled by the individual and contract and extend at will. Muscles use a large amount of the body's energy when they contract. This increases the metabolic rate, which, in turn, produces a vast amount of heat. This is especially important for individuals living in cold climates.
Smooth muscles work involuntarily. These muscles line the various internal organs, and they contract rhythmically on their own. They cause food to pass through the digestive tract, aid in breathing and control the flow of blood in the arteries.
The cardiac muscles are some of the strongest muscles in the body. They are found exclusively in the heart, and, like the smooth muscles, work involuntarily. These muscles cause the contraction of the heart, which results in blood being pumped through the circulatory system and throughout the human body.Learn more about Muscles
The human muscular, or musculoskeletal, system is comprised of the muscles, bones, tendons, ligaments, joints, cartilage and other tissues that both support the body and enable movement. The skeletal, or voluntary, muscles convert the body's chemical energy into forces that cause them to contract and move the bones and tissues connected to them. Smooth and cardiac muscles are referred to as involuntary muscles because, unlike the skeletal muscles, they perform their functions without a need for conscious control.Full Answer >
The main functions of the musculoskeletal system are to support the body, help the body maintain posture and protect vital organs. Skeletal muscles are supported by the bones, and they work together to allow the body to move.Full Answer >
The muscular system supports body movement, maintains posture, and circulates blood through the body. According to Live Science, the system consists of 650 skeletal, smooth and cardiac muscles.Full Answer >
The two major functions of the muscular system are the ability to make the body move and the posture of the body. The muscles enable the arms, legs and other parts of the body to move while keeping the body in an upright or sitting position without falling over.Full Answer >