Welcome to the electronic educational frontier for the 21st century. The vertebral column and thoracic cage. As you recall, the axial skeleton comprises of the skull, vertebral column, and the thoracic cage, and one unattached bone. You have an unlimited number of attempts to aid in learning this material and build test-taking skills. Each attempt results in generating a new set of questions and answers! It is your goal to identify these bones and variation processes. GOOD LUCK!!!!