Giraffes have a diastema, or space, between their incisors and premolars. This space allows them to grip leaves and twigs with their tongue and pull them into their mouths. The giraffe's tongue is long and prehensile, and it can reach up to 18 inches out of its mouth.
Giraffes also have a special pad of tissue called the "palatal papillae" on the roof of their mouths. This pad helps them to grip and tear leaves and twigs.
The giraffe's dentition is well-suited for their herbivorous diet. They are able to graze on a variety of plants, including leaves, twigs, buds, and fruits. Giraffes are also known to eat bones and antlers, which helps them to obtain calcium and other minerals.