1. How Nutrients Become You

2. Food, Nutrients, and Energy
Six Nutrient Groups:
Carbohydrates
Fats
Proteins
Vitamins
Minerals
Water

3. The Functions of Nutrients
Essential nutrients from food are used to:
* build and repair body tissues
* regulate all body processes
* provide energy

4. Chemistry of Nutrients
Five of the basic nutrient groups are compounds:
Carbohydrates
Fats
Proteins
Vitamins
Water
Minerals are elements.

5. The Energy Value of Food
The energy value of food is measured in units called kilocalories.
1 gram of carbohydrates = 4 kilocalories of energy
1 gram of fat = 9 kilocalories of energy
1 gram protein = 4 kilocalories of energy
Water, vitamins, and minerals do not yield energy.
The more calories in a food, the more energy it will provid.

6. The Digestion Process
Digestion is the process by which your body breaks down food, and the nutrients in food, into simpler substances.
Mechanical digestions happens as food is crushed and churned.
Chemical digestion is when food is mixed with powerful acids and enzymes.

7. Digestion
As food is digested, it passes through a muscular tube leading from the mouth to the anus. This tube is called the gastrointestinal (GI) tract.
Each section performs important functions.

8. Sections of the GI tract
The mouth
The esophagus
The stomach
The small intestine
The large intestine

9. Absorption of Nutrients
Absorption is the passage of nutrients from the digestive tract into the circulatory of lymphatic system.
Some nutrients can dissolve in water. They are called water-soluble nutrients.
Some nutrients can dissolve in fat. They are called fat-soluble nutrients.

10. Digestion
Digestion Video

11. Assignment Read text pages 43-50 (up to metabolism).
Answer questions on page 56.
#’s 1 – 9. Due tomorrow.