1, digestion and absorption function. Biting is the first step in the digestive process. According to a bite, the ingredients are chopped and ground, and fully mixed with the spittle, so that the pepsin in the spittle can basically digest and absorb the ingredients at first, producing soft food balls, which is beneficial to swallowing.

2. Language function. It is a unique function of human beings and one of the key special tools for business activities. Although the noise comes from the cyclone that the bronchus vibrates the throat, it must be coordinated by the tongue, palate, lips and teeth. Only in this way can the sound be mellow and pleasant, and the phonetic symbols can be pronounced accurately and clearly.

3. Visual beauty function. Red lips and bright teeth have been one of the aesthetic standards for many years. Neat white teeth are undoubtedly a key component of a handsome appearance. According to the chewing movement of teeth, it can also cause a physiological stimulation, promote the normal growth and development of the face and frontal bone, make the muscles plump and firm, and make the appearance symmetrical and harmonious, thus creating a pleasing artistic beauty.

Oral composition

1, lip. Lip is the front wall of oral cavity, which is divided into upper lip and lower lip. A longitudinal mark in the middle of the upper lip is between people, which is where people get stuck when treating coma symptoms. The crack between the two lips is called mouth crack, and the edge is called squabble.

2, cheeks. Cheeks form the sides of the mouth, which is the position of our left and right faces.

3, the upper jaw. Palate is the top of the oral cavity, the front two-thirds is hard palate, and one-third is soft palate, which is covered by oral mucosa. Behind the palate is the palatal sail, and behind the palatal sail is the palatal droop, which is what we often call the position of tonsils. Further down is the dividing line between mouth and throat.

4. Tongue. The tongue, located at the bottom of the mouth, is a kind of muscle organ, which can feel the five flavors of sweet, sour, bitter, spicy and salty, and can also help chewing and swallowing. It is an important organ in the oral cavity. Tongue has upper and lower sides, and many taste bud tissues are distributed.

5, teeth. Teeth are familiar parts, which are divided into upper and lower teeth and big teeth. Teeth are divided into crown, gum and root. Most people will have two sets of teeth all their lives. When they are babies, they will be replaced by permanent teeth one by one at the age of six or seven. If permanent teeth are pregnant, they can only be filled or transplanted.