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Typical renal urinary output curve measured in a perfused isolated kidney, showing pressure diuresis when the arterial pressure rises above normal.

In the human being, the renal-body fluid system for arterial pressure control, just as in the hagfish, is the fundamental basis for long-term arterial pressure control. However, through the stages of evolution, multiple refinements have been added to make this system much more exact in its control in the human being. An especially important refinement, as we shall see, has been addition of the renin-angiotensin mechanism.

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Essentials of Human Physiology

Essentials of Human Physiology

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.

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