屈曲
Flexio
定义
Angular movement occurs only between the long bones, and by it the angle between the two bones is increased or diminished. It take place forward for the flexion.
成角运动仅发生于长骨之间，通过此运动，两骨之间的角度得以增大或减小。当运动向前发生时，称为屈曲。
參考資料
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
