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1 Skeletal muscle: This type of muscle creates movement in the body. 2  There are more than 600 skeletal muscles, and they makes up about 40 percent of a personâs weight. 3  When the nervous system signals the muscle to contract, groups of muscles work together to move the skeleton.
The autonomic motor neurons in the ganglia send efferent fibers (postganglionic autonomic nerve fibers) to innervate cardiac muscle fibers of the heart and smooth muscle fibers of body organs and glands. Examine a sympathetic ganglion in slide #74 (W pg 139, 7.21).