A '''placenta''' is a bodily structure that allows nutrient and gases to pass between the mother and the [[embryo]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia | A '''placenta''' is a bodily structure that allows nutrient and gases to pass between the mother and the [[embryo]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia |