Digestive System

1. system a group of organs that work together to break down and absorb nutrients from food, as well as eliminate the resulting wastes
3. plant material in food that is difficult to digest
5. a molecule, usually a protein, which catalyzes a chemical reaction
6. the taking in of one substance by another
7. digestion chemical breakdown of nutrients through the action of enzymes and other substances
9. a component of a fat molecule, along with glycerol.
12. a simple carbohydrate that may be a monosaccharide or a disaccharide.
13. carbohydrate a long carbohydrate molecule formed by chains of sugars
15. acid an organic molecule containing a carboxyl and an amino group
16. the breakdown of food into simpler components that can be absorbed and used by the body
17. a substance that is used by the body for energy, growth, or other processes essential to life.

2. the process by which wastes are removed from the body
4. physical breakdown of foods
8. organic molecule consisting of three fatty acids attached to a glycerol “backbone"
10. organic molecules containing hydrogen, carbon, and oxygen
11. calorie a unit used to measure the energy in foods
14. an organic molecule consisting of a long chain of amino-acids folded into a particular shape