The diagnosis of intra-ahdominal disease is more often dependeni upon a careful history' than on the presence of physical signs. Pain is prominent among the symptoms encountered in the alimentary system, and may also be present in genitourinary diseases. When pain is present, taking an accurate history usually indicates the probable diagnosis and the best method of investigating the problem. If the history is inadequate, unnecessary tests may result in the discovery of asymptomatic abnormalities such as hiatus hernia or gallstones, leading to inappropriate management and even unnecessary surgery. Conversely, some important conditions, such as chronic renal failure, may only be detected on biochemical screening, in the absence of symptoms or signs.
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This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.