Human Biology
그들을 선택함으로써 경험을 향상시키세요
In his neck.
In the middle of his back.
In his upper back.
In his lower back.
마스터 Spine (Vertebral Column)가 Bruce Bryan 짧은 영상으로 설명해 줍니다
Which part of the spine will have fewer individual bones as you age?