The system in the body composed of muscle cells
and tissues that brings about movement of an organ or body part. There are three kinds of muscle: skeletal muscle, which is
attached to bones and allows the voluntary movement of limbs; smooth muscle, which is found in internal organs
and aids in the involuntary movements that occur in the circulatory, digestive, excretory, reproductive, and respiratory systems; and cardiac muscle, which forms the powerful walls
of the heart.
and tissues that brings about movement of an organ or body part. There are three kinds of muscle: skeletal muscle, which is
attached to bones and allows the voluntary movement of limbs; smooth muscle, which is found in internal organs
and aids in the involuntary movements that occur in the circulatory, digestive, excretory, reproductive, and respiratory systems; and cardiac muscle, which forms the powerful walls
of the heart.
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