Apyramidra U-Wpulgv Card (再生牙齒-上頜)


Apyramidra U-Wpulgv Card

人類牙齒的主要功能是通過切割和磨碎的方式來分解食物,為吞嚥和消化作準備。 人類共有四種類型的牙齒,每種都有不同的用途。門齒用於切割食物,犬齒用於撕碎食物,大及小臼齒用於碾碎食物。牙齒的牙根是嵌入在上頜骨(上頜)以及下頜骨(下頜)的牙槽骨,它們被牙齦覆蓋。牙齒是由多重組織組成,具有不同的密度和硬度。


The human teeth function to mechanically break down items of food by cutting and crushing them in preparation for swallowing and digesting. Humans have four types of teeth: incisors, canines, premolars, and molars, which each have a specific function. The incisors cut the food, the canines tear the food and the molars and premolars crush the food. The roots of teeth are embedded in the maxilla (upper jaw) or the mandible (lower jaw) and are covered by gums. Teeth are made of multiple tissues of varying density and hardness.