By far the most extensively developed organ in the bodies of man and other vertebrates is that of the musculature, the “flesh.” The muscles make up 40 to 50 percent of the total body weight. Their main function is to contract in order to develop force. They are also, among other things, important for the thermal regulation of the body, but the heat-producing role of the musculature will not be discussed here in connection with the neurophysiological features.
KeywordsSarcoplasmic Reticulum Motor Unit Actin Filament Isometric Contraction Contractile Force
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