Muscle cells contain filaments made of the proteins actin and myosin, which lie parallel to each other
TYPES OF MUSCLES
• Skeletal muscle - effects voluntary movement and is made up of bundles of elongated cells (muscle fibers), each of which contains many nuclei.
• Smooth muscle - provides the contractile force for the internal organs and is controlled by the autonomic nervous system.
• Cardiac muscle - makes up the muscle of the heart and consists of a meshwork of striated cells.
Problems and Illness
• Arthritis
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