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The new Fourth Edition of HUMAN PHYSIOLOGY: FROM CELLS TO SYSTEMS continues in the steps of its predecessor, which has long been known as the best-written text in the market. Sherwood's clear writing style makes her explanations of concepts easy for students to grasp and comprehend, guiding them through the discovery of how each component of the human body is interdependent on others, while the text's logical organization maintains a comprehensive level of coverage. The text focuses on the mechanisms of body function from cells to systems, with the theme of homeostasis carried throughout each chapter. The Fourth Edition has been completely revised to include the most current content and cutting-edge topics, and has been visually enhanced, with hundreds of new photos and illustrations to help students understand difficult concepts with greater ease.