Giraffes have 32 powerful teeth that they use to grind and chew up food, such as leaves and twigs. However, their teeth are positioned at the back of their skull and not the front of their mouth. Humans can feed giraffes without concern of being bitten.
Giraffes have a bony ridge and a long tongue at the front of their mouths, which they use to grab and taste food before chewing. They use their tongues to grab twigs and leaves and then pull them to their teeth for chewing. The upper lip of a giraffe provides protection against thorns when grabbing food.