Bone joints play a role in connecting bone and bone, so that the limbs have mobility, the role of muscle is to drive the bone and joint activities as well as independent contraction to produce physiological functions. 1. Bone joints: the connection between bone and bone is called joints, joints through the activities, can make the limbs with mobility, the more joints in the parts of the higher mobility, when the human body strenuous activities, such as running, jumping, etc., the joints can also play a role in the protection of the organism. 2. Muscle: Skeletal muscle through contraction and diastole can be driven by bone and joint activity, so that the body produces movement function, some of the transverse muscle, such as cardiac muscle, etc., through the voluntary contraction of the whole body to maintain circulation, so that the body to maintain physiological function. Bone joints and muscles are important tissues of the human body, usually to protect, once found abnormal, should go to the hospital in a timely manner, under the guidance of a professional doctor for diagnosis and treatment, do not be negligent, so as not to delay the condition.