有關牙齒的認識

牙齒的構造、特徵及相應功能。

Structure	Characteristics	Related function(s)
Enamel	Non-living, made mainly of calcium salts	Protect the tooth from  wearing
Dentine	Contain living tissue	Replace the enamel
Pulp cavity	Contain nerve fibre Contain blood vessels	Detect temperature and pressure Supply oxygen and nutrients to the tooth

不同種類牙齒的特徵及相關功能。

Type	Features	functions
Incisor	Chisel-shaped / with flat sharp edge	Biting and cutting food
Canine	Pointed and curved	Tearing flesh (with the help of muscles)
Premolar	Broad top with cusps	Crushing and grinding food
molar	Broad top with cusps	Crushing and grinding food