Mouth anatomy, illustration. At left, the bones of the skull are seen from the side, including the upper jaw bone (maxilla) and the lower jaw bone (mandible). Some of the muscles (red) are shown associated with the temporomandibular joint. At right, the mouth is open, showing the teeth, tongue, uvula, the roof of the mouth (the palate) and the tonsils (either side of the back of the mouth). There are 32 adult teeth in humans.