Concentrate right now and imagine that you are about to eat a lemon. Think of yourself biting into this lemon. Do you feel the saliva beginning to flow?

This is one of the interesting things about our salivary glands. They don’t function mechanically, but are subject to the control of the brain. There are three pairs of salivary glands. One is in front of the ear, one under the tongue, and one under the lower jaw.