The tooth has two anatomical parts, the crown and the root.
The crown of a tooth is the top part that is exposed and visible above the gum (gingiva). It is covered with enamel, which protects the underlying dentine.
The root of a tooth descends below the gum line, into the upper or lower jawbones, anchoring the tooth in the mouth. Different types of teeth have a different number of roots and root formations. Typically incisors, canines and premolars will have one root whereas molars will have two or three.
The neck is the dividing region of tooth at the gum line, where the crown meets the root.
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