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The jelly-like substance that separates the [[epidermis]] from the inner [[cell]]s in a [[sponge]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia
The jelly-like substance that separates the [[epidermis]] from the inner [[cell]]s in a [[sponge]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia
Educational Ministries, Inc. 1998</ref>
Educational Ministries, Inc. 1998</ref>
==References==
==References==