The term 'kind of skeleton' can refer to two different types of skeletons: axial and exo. An axial skeleton is the internal skeleton of vertebrates, which includes the skull, vertebral column, ribs, and sternum. An exo skeleton is an external skeleton found in some invertebrates, such as insects and crustaceans. Both axial and exo skeletons provide support and protection for the body, and both are composed of bone or cartilage.