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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Have you ever been envious of people who seem to have no end of clever ideas, who are able to think quickly in any situation, or who seem to have flawless memories? Could it be that they're just born smarter or quicker than the rest of us? Or are there some secrets that they might know that we don't?