| − | 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''' is a linked collection of veins, vesicles, muscles, and arteries which as a whole transports [[blood]] rich with [[oxygen]], [[chemical energy]], amino acids, and other necessary nutrients throughout a creature's body.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref> |