The pulp is like a house for the nerves and blood vessels at the center of the crown and root. Teeth have different shapes for different jobs. For example, when you eat, the upper teeth work together with the lower teeth of the same shape to bite, chew, and tear food. They have sharp, chisel-shaped crowns that cut food. The four cuspids are next to each incisor.
Cuspids have a pointed edge to tear food.
Also called bicuspids, the four pairs of molars are located next to the cuspids. They crush and tear food. There are twelve molars, in sets of three, at the back of the mouth. They have wide surfaces that help to grind food. Adults have 32 teeth.