They are a set of salivary glandsdeep in the upper part of the throat.
They were discovered recently by Scientists in the Netherlands.
The glands are about 1.5 inches (3.9 centimeters) in length on average and are located over a piece of cartilage called the torus tubarius.
The glands probably lubricate and moisten the upper throat behind the nose and mouth.
The discovery may be important for cancer treatment.
Until now, there were three known large salivary glands in humans:one under the tongue, one under the jaw and one at the back of the jaw, behind the cheek.
