From my own knowledge pandas have exoskeletons. The skeleton of the giant panda is very similar to that of bears except for a general increase of size of the compact bone throughout the entire skeleton. The most advantageous place for the giant panda to have an enlarged skeleton is in the skull region to support the increase in the jaw musculature. An increase of the whole skeleton may have been necessary to increase the size of the skull, thereby allowing a quick, powerful closure of the mandible.
Hope I helped. :)
