Guyton and Hall Textbook of Medical Physiology continues this bestselling title’s tradition as the world’s favorite physiology textbook, presenting complex principles in language that is easy to read and understand. The main aim of the Fourth South Asia Edition of Guyton & Hall Textbook of Medical Physiology is to meet the needs of undergraduate medical students and faculty in South Asia by aligning the book to modern recommended teaching methods in the subcontinent. The South Asia Edition incorporates several features aimed at aiding learning for students while retaining the flow and explanatory approach.