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· There are about 2000-4000 taste buds on our tongue. Each taste bud contains a variety of sensor cells. It can taste five basic flavors of sweet, sour, bitter, salty, and fresh. Among them, the tip of the tongue is more sensitive to sweetness, the tongue is more sensitive to bitterness, the tongue side is more sensitive to the sour taste, and the salty taste is more sensitive to the salty taste.

· In addition, people's sensitivity to different tastes is also different. People are the most sensitive to bitter substances. In the solution, as long as 0.00005 % of bitter substances have a bitter taste. This may be related to the primitive people to identify toxic substances. Acetic acid needs to reach 0.0012 % to feel sour, while salty taste requires 2 % salt content to feel. Taking sucrose as an example, sweet substances will be perceived by 5 %.

· When eating, it affects us not only the taste of taste buds, but also the back of the nasal nose. If there is no smell of smell after the nose, there is no aroma when eating. It tastes like a cold when eating a cold because the smell of the nose after the nose disappears. In addition, the soft and hard texture and touch will also affect our feelings of ingredients. For example, some people like to eat hard noodles and some people like to eat soft noodles. Eating heavy -flavored things for a long time, people rarely feel the stimulus of other senses on food. When you eat next time, you might as well feel the rich feeling of food in the mouth.

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