Natural products vary in solubility, but why Chinese medicine traditionally often uses water to decoct herbs

Water in the process of decocting Chinese herbs, water can break down the absorption of the chemical components of the herbs by plant cell tissues, so that the chemical components are free and dissolved in water. In the ancient Chinese medicine decoction in addition to the need to use a casserole or earthenware pot, the decoction of water is also special attention, in the process of decoction, they have to be based on different prescriptions to use the water requirements are not the same.