The amount of food that a person ingests is determined principally by intrinsic desire for food called hunger. The type of food that a person preferentially seeks is determined by appetite. These mechanisms in themselves are extremely important automatic regulatory systems for maintaining an adequate nutritional supply for the body; they are discussed in Chapter 71 in relation to nutrition of the body. The current discussion of food ingestion is confined to the mechanics of ingestion, especially mastication and swallowing.
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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.