The human skeleton is the internal framework of the body. It is composed of 270 bones at birththis total decreases to 206 bones by adulthood after some bones have fused together. The bone mass in the skeleton reaches maximum density around age 30.

相关关键词

三维空间, 解剖學, 臂膀, 脊背, 骨頭, cervical, 膛, 纵队, 音步, 音步, 指针, 臀部, 人類, 骷髅, 骨节, 膝盖, leg, 肢体, 更低, 零件, render, 骨子, 肩胛骨, 骼, 髑, 胸骨, 牙, 胸部, 高位, 椎骨, 腕子