Cats’ spines and bones are very soft and can be reduced at will. According to scientific experiments, cats have a total of 240 bones in their bodies, which is 34 more than human bones. These extra bones can make the cat’s body softer. In addition, Cats also have thick fibrous cartilage in the middle of their spines. These cartilages can help cats expand and contract, so they can burrow into objects smaller than themselves.