This text discusses hydrostatic skeleton, exoskeleton, endoskeleton,the skull, the vertebral column, the thoracic cage, human appendicular skeleton, the pectoral girdle, the upper limb, the pelvic girdle, the lower limb, and evolution of body design for locomotion on land. Advanced Placement® and AP® are trademarks registered and/or owned by the College Board, which is not affiliated with, and does not endorse, this textbook.