A student is shown an unlabeled simplified model of a cell and its sub cellular structures the student is asked to define the model to show a cell that can meet high energy demands which refinements best addresses this task

Which statement applies only to the axial skeleton, not the appendicular skeleton? a. it contains a pivot joint. b. it has muscles attached that work in pairs. c. it contains red bone marrow. d. it possesses fossa for bone articulation. e. it protects the heart and lungs.