The document discusses the five senses and related human body systems. It is divided into three main sections: the nervous system, the five senses (sight, hearing, smell, taste, touch) and the five sense organs (eyes, ears, nose, tongue, skin). Each sense is explained in its own subsection, covering how it works and its related body parts. The sections also discuss the brain and nerves, and how the senses allow the body to interact with and understand its environment.
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