Write the term that best completes each statement.

1. The pathway taken by food through the body is called the ?.
   
2. The largest internal organ in your body is the ?.
   
3. The worst meal of the day to skip is ?.
   
4. Muscles in the esophagus move food along in a motion called ?.
   
5. The liquid produced by the liver to aid digestion is ?.
   
6. The best way to lose weight is to eat right and to _? regularly.
   
7. A monounsaturated fat is lacking one ? atom.
   
8. Chemical reactions in the body are controlled by ?.
   
9. Crystals of bile salts that cause pain are called ?.
   
10. Vitamin ? is responsible for blood clotting.
    
11. Cirrhosis of the liver is caused mainly by drinking too much ?.
    
12. Sodium and ? help to maintain the water balance in the body.
    
13. The ? keeps food from going down the trachea.
    
14. Vitamin ? is called the sunshine vitamin.
    

List the five major classifications of nutrients.