4/15 One, the upper, leads into the nose. One of these leads into the stomach, and the other leads to the lungs. The back part of the mouth joins the two tubes which lead from the mouth to the lungs and the stomach, and is called the _throat_. The mouth contains the _tongue_ and the _teeth_. The Teeth.~--The first teeth, those which come when we are small children, are called _temporary_ or _milk teeth_. |