The skeletal system was divided into 13 regions: skull, sternum, clavicle, cervical spine, thoracic spine, lumbar spine, sacrum, ribs, pelvic bone, scapula, humerus, femur, and tibia/fibula.

• 将骨骼系统分为13个区域观察：颅骨、胸骨、锁骨、颈椎、胸椎、腰椎、骶椎，肋骨、骨盆、肩胛骨、肱骨、股骨、胫腓骨。