Dictionary > Muscular system

Muscular system

An organ system comprised of skeletal muscles, smooth muscles, and cardiac muscles that are responsible for providing strength, keeping up balance, maintaining posture, allowing movement and producing heat
The animal body is comprised of various organ systems and the muscular system is one of them. The muscular system includes all the muscle tissues such as the skeletal muscle tissues, smooth muscle tissues, and cardiac muscle tissues. The skeletal muscles are muscles attached to the bones and are responsible for the voluntary movements of the body. The smooth muscles are muscles found in the walls of the digestive tract, arteries, urinary bladder, uterus, male and female reproductive tracts, respiratory tract, ciliary muscles, and other internal organs. The cardiac muscles are muscles of the heart. Both skeletal muscles and cardiac muscles are striated muscles. However, the cardiac muscles are branched, forming intercalated networks. The skeletal muscles are arranged into overlapping filaments, thus, appear striated under the microscope. The smooth muscles, in turn, lack the striations and appear smooth under the microscope (thus the name). The muscular system is responsible for the creation of movement or locomotion. Skeletal muscles allow movement or locomotion in animals (especially voluntary movements). Cardiac muscles are responsible for the pumping of the blood in the heart. These muscles, together with the smooth muscles, are involved in the involuntary movements of the internal organs of the body. The smooth muscles, for instance, aid in the flow of the blood through the blood vessels.
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