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pathophysiology. noun. 1  The functional changes associated with or resulting from disease or injury. 2  The scientific study of such changes. 3  In both senses also called physiopathology.
Etiology is the cause. Pathophysiology is the effect, or what occurs as a result. Cause: Think of the etiology as what has triggered the condition. In other words, if not for _____ this condition wouldn't exist. If the cause hadn't been encountered or if it was removed, the disease would never have appeared and might even disappear.