| − | A '''system''' that transports food and other necessary substances throughout a creature's body.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref>
| + | The '''circulatory system''' transports food and other necessary substances throughout a creature's body.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref> |