Covers the physiologic principles and concepts necessary to understand and treat patients with digestive or liver diseases.|Emphasizes high-yield information in a reader-friendly style. |Includes useful pedagogical features such as Objectives, Key Concepts, and Study Questions |Reflects the growing importance of the gastrointestinal physiology field and the related clinical implications to health and disease. |Provides an easy and concise review for the USMLE Step 1.|Provide review of core concepts and highlight clinical applications