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The mouth plays an important role in eating, drinking, and speaking. Mouth breathing refers to the act of breathing through the mouth (as a temporary backup system) if there is an obstruction to breathing through the nose, which is the designated breathing organ for the human body. [8]
The mouth is the body orifice through which many animals ingest food and vocalize. The body cavity immediately behind the mouth opening, known as the oral cavity (or cavum oris in Latin ), [ 2 ] is also the first part of the alimentary canal , which leads to the pharynx and the gullet .
Human teeth function to mechanically break down items of food by cutting and crushing them in preparation for swallowing and digesting. As such, they are considered part of the human digestive system. [1] Humans have four types of teeth: incisors, canines, premolars, and molars, which each have a specific function. The incisors cut the food ...
The average length of the human tongue from the oropharynx to the tip is 10 cm. [4] The average weight of the human tongue from adult males is 99g and for adult females 79g. [5] In phonetics and phonology, a distinction is made between the tip of the tongue and the blade (the portion just behind the tip).
Adult humans have 12 molars, in four groups of three at the back of the mouth. The third, rearmost molar in each group is called a wisdom tooth. It is the last tooth to appear, breaking through the front of the gum at about the age of 20, although this varies among individuals and populations, and in many cases the tooth is missing. [1]
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Adult humans normally have eight incisors, two of each type. The types of incisors are: maxillary central incisor (upper jaw, closest to the center of the lips); maxillary lateral incisor (upper jaw, beside the maxillary central incisor)
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