The division of the skeletal system that contains bones along the central line of the body is called what

The skeletal system of a human body gives form, shape, and structure of the body. These includes all the bones and all the joints with each bone being a complex organ itself. 

The skeletal system has two divisions: (1) axial and (2) appendicular. All the vertical 80 axial bones comprised the vertical axis of the body while the 128 including free appendages consist the second division.

The answer to the question above based on the description given is AXIAL. 

The answer is ozone layer.