Mouth parts are the various structures that make up the mouth of an organism. The TONGUE, which is six letters long, is a muscular organ located in the mouth that is used for tasting, swallowing, and speaking. The DELTA, which is five letters long, is the triangular area at the back of the TONGUE where it connects to the throat. The JAW, which is three letters long, is the lower part of the face that holds the teeth and helps with chewing and speaking. The ROOF, which is four letters long, is the upper part of the mouth that separates the oral cavity from the nasal cavity. The UVULA, which is five letters long, is a small fleshy projection at the back of the throat. Lastly, the LIP, which is three letters long, is the fleshy outer edge of the mouth that helps form facial expressions and assists with eating and drinking.