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Systems 3.3
| Term | Definition |
|---|---|
| digestion | the process that breaks complex molecules of food into smaller nutrient molecules |
| nutrients | substances in food that provide the raw materials and energy needed for an organism to carry out its essential processes |
| carbohydrates | an energy-rich organic compound, such as a sugar or a starch, that is made of the elements of carbon, hydrogen, and oxygen |
| peristalsis | waves of smooth muscle contractions that move food through the esophagus toward the stomach |
| saliva | a fluid produced in the mouth that aids in mechanical and chemical digestion |
| enzyme | a type of protein that speed up chemical reactions in the body |
| absorption | 1. the process by which nutrients molecules pass through the wall of the digestive system into the blood 2. the process by which an object takes in, or absorbs, light |
| elimination | the process of getting rid something that is no longer needed |