运动系统 *脊柱: Cervical spine-7 Thoracic spine-12 L umbar spine S acral spine Cocco Ine *四肢和关节: Upper extremities: shoulder joint, elbow Joint, wrist Joint ower extremities: hip joint, knee joint, ankle joint运动系统 脊柱：Cervical spine -7 Thoracic spine -12 Lumbar spine -5 Sacral spine -5 Coccyx spine -4 四肢和关节:Upper extremities: shoulder joint, elbow joint,wrist joint Lower extremities: hip joint, knee joint,ankle joint