全身的骨骼肌大大小小共有六百多块,大块的有二公斤多重(如股四头肌),最小的只有几克重(如镫骨肌)。这些肌肉大都跨过关节附着在骨骼上,当它们收缩时就带动骨骼完成各种动作。打球、赛跑、游泳等各式各样的体育运动,归根结底也是靠肌肉完成的,而当肌肉在完成 Skeletal muscles of the body a total of more than 600 large and small, large two kilograms of multiple (such as the quadriceps), the smallest only a few grams of weight (such as tarsal muscles). Most of these muscles across the joints attached to the bones, when they are contracted to lead the skeleton to complete a variety of actions. A variety of sports such as playing, running, swimming and so on are, in the final analysis, done by the muscles, and when the muscles are finished