How are ants jaw different from humans?

Ant jaws (mandibles) are both movable joints and move horizontally together to grab, dig, and cut, in addition to handling food. The mandibles move food to the ant's mouth, located behind them.

Human jaws include the upper jaw (maxilla) which is fixed to the skull, and the lower jaw (mandible) which moves up and down, and slightly sideways, to grab, cut, and chew food.

Ants do not have true teeth, which in humans consist of 16 pairs (more or less), half on the upper jaw and half on the lower jaw, all inside the mouth. Some teeth (molars) are specialized for grinding food.