does it have any functionality?
Yes, they are involved in detecting the five elements of taste perception: salty, sour, bitter, sweet and umami.
Introduction
These structures are involved in detecting the five elements of taste perception: salty, sour, bitter, sweet and umami. 
the movement of food in food pipe is called Peristaltic contractions. enumerate any notable structural mention? Taste buds, mediastinum, diaphragm, trachea, etc. what does the first thing mentioned here compose of? Taste receptor cells.
These structures are involved in detecting the five elements of taste perception: salty, sour, bitter, sweet and umami. These structures are involved in detecting the five elements of taste perception: salty, sour, bitter, sweet and umami. They  are involved in detecting the five elements of taste perception: salty, sour, bitter, sweet and umami.
Taste bud Taste bud Taste bud
Introduction Introduction Introduction
These structures are involved in detecting the five elements of taste perception: salty, sour, bitter, sweet and umami. These structures are involved in detecting the five elements of taste perception: salty, sour, bitter, sweet and umami. are involved in detecting the five elements of taste perception: salty, sour, bitter, sweet and umami.
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Taste bud [SEP] Introduction
Taste buds contain the taste receptor cells, which are also known as gustatory cells. The taste receptors are located around the small structures known as papillae found on the upper surface of the tongue, soft palate, upper esophagus, the cheek, and epiglottis. These structures are involved in detecting the five elements of taste perception: salty, sour, bitter, sweet and umami. A popular myth assigns these different tastes to different regions of the tongue; in reality these tastes can be detected by any area of the tongue. Via small openings in the tongue epithelium, called taste pores, parts of the food dissolved in saliva come into contact with the taste receptors.