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Introducing links to existing pages
An '''Open circulatory system''' is a [[circulatory system]] that allows the blood to flow out of the [[blood vessel]]s and into various body cavities so that the cells are in direct contact with the blood.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia
An '''Open circulatory system''' is a [[circulatory system]] that allows the [[blood]] to flow out of the [[blood vessel]]s and into various body cavities so that the [[cell]]s are in direct contact with the blood.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia
Educational Ministries, Inc. 1998</ref>
Educational Ministries, Inc. 1998</ref>