| − | An '''endoskeleton''' is a [[skeleton]] on the inside of a creature's body, typically composed of [[bone]] or [[cartilage]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref> | + | An '''endoskeleton''' is a [[skeleton]] that is inside a creature's body. It is typically composed of [[bone]] or [[cartilage]].<ref>WordNet: [http://wordnetweb.princeton.edu/perl/webwn?s=endoskeleton Endoskeleton]</ref> |