The human skeleton is a complex structure of bones, cartilages, and connective tissues that has evolved to support bipedal locomotion and upright posture. It is divided into two main parts: the appendicular skeleton and the axial skeleton, with a total of 206 bones. The skeleton not only provides structure and shape to the body but also enables movement. Through interactive models and visual tutorials, one can learn about the different types and functions of bones, such as the long bones and the living tissue in bones.