Knowledge adquisition 1

1. System that helps protect the body from disease.
3. It is the most important nutrient.
5. A____diet provides nutrients in adequate amounts and enough energy for a person to maintain a healthful weight.
7. In this phase they are involved Mechanical and chemical digestion.
8. Basic unit of structure and function in living things.
10. Most nutrients from food are absorbed through the walls of the________intestine.
12. Fruits contain simple sugar and _________.
13. Some materials travel through the large intestine and are eliminated from the body as feces by _______.
16. The_______the body needs include water, carbohydrates, fats, proteins, vitamins and minerals.

2. System which is composed from brain, spinal cord and nerves.
4. third phase in the digestive system in which food is absorbed by cells in the small intestine.
6. A group of cells that perform a single function.
9. A group of organs that perform closely related functions.
11. Molecules in food contain chemical energy that cells use to produce ________.
14. System that breaks down food; absorbs nutrients;eliminates wastes.
15. A group of different types of tissues that work together to perform a single or several related functions.