The document discusses the five human senses - sight, hearing, taste, smell, and touch. It explains that sight involves the eyes, hearing involves the ears, taste involves the tongue, smell involves the nose, and touch involves the skin. The document then defines disability as the inability to use one of the senses, such as blindness being the inability to see or deafness being the inability to hear. It notes that disability can be present from birth, develop from illness or injury, or come with age.