This textbook is written keeping in mind about the students who are freshly entering into medical colleges. Hence every effort is made to write this book in concise, easily understandable and can perform the practical exercises as per the guidance of the experienced teacher of the subject. This book is prepared as reference book of UG, PG, M.B.B.S. Students for quick review of physiology. This book can also be used as reference book by Paramedical, Nursing and Dental students like Physiotherapy, Occupational Therapy, Nutrition and Dietetics, and other Health Science students. ​This textbook explains basic concepts and principles necessary to understand mechanisms and various complicated functions of human body. The aim of writing this book is to present required information in clear, lucid and concise manner with many examples and clinical importance in each section. This textbook can be easily understandable by fresh medical students and is a useful reference book for other clinical subjects in future years. To understand the clinical importance of physiology, relevant clinical notes are added at appropriate places. Wherever it is important Applied physiology of clinical importance is added. To help the students during university examination, at the end of each chapter Long questions, Short questions, Multiple Choice Questions are included. Now-a-days a lot of importance is given to sports, hence a new chapter “EXERCISE PHYSIOLOGY” is included. Even though this textbook is basically for medical students, this book can be useful for Dental, Nursing and other Allied Medical students.