Taste is one of the five senses that people have. However, your sense of taste alone cannot recognize how food tastes. When you chew food, its flavor is transferred to the pharynx between the mouth and the nose and you can sense the flavor; it’s because the sense of smell plays an important role. This is why you cannot taste properly if your nose is stuffy.
It is not only the sense of smell that affects taste. Chromatist Nomura Junichi wrapped the same canned coffees with each different color such as red, yellow, blue, and brown. Then he asked people to drink them and asked about their taste. 73% of the participants said that the coffee in brown-colored can had the richest taste, and 87% of them said that the yellow can had the mildest coffee. Even if they were all the same, they tasted differently, depending on the color of the can, because sight has an impact on taste.
Sight, too, influences hearing. The cognitive psychologist Harry McGurk created a video with the audio syllable “ba” dubbed onto a visual “ga.” And he played the tape before people and asked them about what they hear. More people recognized it as “ga” or “da” than “ba.”
Like this, eyes, nose, mouth, and ears are different parts, but only one of them cannot play its role fully. It is because all parts are closely connected to each other.