The book is expected to be a useful aid to the study of medical disorders from a textbook of medicine both at undergraduate as well as post-graduate levels It is also meant to be used as a textbook of patho-physiology by B. Pharm. students.This book gives a brief account of modern concepts of physiology and patho-physiology. It will also be useful to senior medical and surgical specialists engaged in private practice. I hope this group of readers would also be benefited by perusal of this book.vised