دانلود کتاب درسی فیزیولوژی پزشکی گایتون و هال

The Textbook of Medical Physiology is not a reference book that attempts to provide a compendium of the most recent advances in physiology. It is a book that continues the tradition of being written for students. It focuses on the basic principles of physiology needed to begin a career in the health care professions, such as medicine, dentistry, and nursing, as well as graduate studies in the biological and health sciences. It should also be useful to physicians and health care professionals who wish to review the basic principles needed for understanding the pathophysiology of human disease. We have attempted to maintain the same unified organization of the text that has been useful to students in the past and to ensure that the book is comprehensive enough that students will continue to use it during their professional careers. Our hope is that the Textbook of Medical Physiology conveys the majesty of the human body and its many functions and that it stimulates students to study physiology throughout their careers. Physiology links the basic sciences and medicine. The great beauty of physiology is that it integrates the individual functions of all the body’s different cells, tissues, and organs into a functional whole, the human body. Indeed, the human body is much more than the sum of its parts, and life relies upon this total function, not just on the function of individual body parts in isolation from the others. This brings us to an important question: How are the separate organs and systems coordinated to maintain proper function of the entire body? Fortunately, our bodies are endowed with a vast network of feedback controls that achieve the necessary balances without which we would be unable to live. Physiologists call this high level of internal bodily control homeostasis. In disease states, functional balances are often seriously disturbed, and homeostasis is impaired. When even a single disturbance reaches a limit, the whole body can no longer live. One of the goals of this text is to emphasize the effectiveness and beauty of the body’s homeostasis mechanisms as well as to present their abnormal functions in disease.