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Saladin: Anatomy & Physiology: The Unity of Form and Function, Third Edition_
Mitochondria (pink) and rough endoplasmic reticulum (green) in a liver cell (SEM)
Cellular Form and Function
Chapter Review 125
Saladin: Anatomy & I 3. Cellular Form and I Text I © The McGraw-Hill
Physiology: The Unity of Function Companies, 2003 Form and Function, Third Edition
All organisms, from the simplest to the most complex, are composed of cells—whether the single cell of a bacterium or the trillions of cells that constitute the human body. These cells are responsible for all structural and functional properties of a living organism. Cytology,1 the study of cell structure and function, is therefore indispensable to any true understanding of the workings of the human body, the mechanisms of disease, and the rationale of therapy. Thus, this chapter and the next one introduce the basic cell biology of the human body, and subsequent chapters expand upon this information as we examine the specialized cellular functions of specific organs.
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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.