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circulatory system is blood - digestive system is for food
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>
The '''circulatory system''' transports oxygen rich blood and other necessary nutrients throughout a creature's body.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref>
== History ==
== History ==