'Of the approximately 33 bones called vertebrae, 12 of them in the upper back are classified as this'
thoracic
THE HUMAN BODY: Of the approximately 33 bones called vertebrae, 12 of them in the upper back are classified as this
Of the approximately 33 bones called vertebrae, 12 of them in the upper back are classified as this
Of the approximately 33 bones called vertebrae, 12 of them in the upper back are classified as this
THE HUMAN BODY
thoracic
THE HUMAN BODY