1. Unit 3 Physical Health

2. Chapter 8 Eating for Wellness

3. © Copyright 2005 Delmar Learning, a division of Thomson Learning, Inc.3 Chapter Objectives 1.List and discuss the major classifications of nutrients 2.Explain the relationship between foods and metabolism 3.Describe the significance of the essential amino acids 4.Discuss the significance of fats in the diet (continues)

4. © Copyright 2005 Delmar Learning, a division of Thomson Learning, Inc.4 Chapter Objectives (continued) 5.Describe the difference between water- soluble and fat-soluble vitamins 6.Explain the rationale for the food pyramid 7.Demonstrate how to read a food label 8.Explain how to handle food safely to prevent diseases

5. © Copyright 2005 Delmar Learning, a division of Thomson Learning, Inc.5 Introduction Food is an important part of life and culture Food choices and nutrition greatly affect health both for teens and for adults Eating habits tend to persist, so it’s important to establish good ones as a young person

6. © Copyright 2005 Delmar Learning, a division of Thomson Learning, Inc.6 Nutrients Substances in food that the body needs Extracted from foods during digestion Body needs six basic nutrients 1. Carbohydrates 2. Proteins 3. Fats 4. Vitamins 5. Minerals 6. Water

7. © Copyright 2005 Delmar Learning, a division of Thomson Learning, Inc.7 Carbohydrates Provide energy Maintain growth Two kinds 1. Simple 2. Complex

8. © Copyright 2005 Delmar Learning, a division of Thomson Learning, Inc.8 Proteins Build and repair tissues Regulate body functions The body breaks down proteins from foods into amino acids –Essential amino acids –Complete proteins –Incomplete proteins

9. © Copyright 2005 Delmar Learning, a division of Thomson Learning, Inc.9 Fats (Lipids) Concentrated form of energy Some fats necessary for good nutrition Three types of fat 1. Saturated 2. Polyunsaturated 3. Monounsaturated Essential fatty acids are necessary for normal growth and development

10. © Copyright 2005 Delmar Learning, a division of Thomson Learning, Inc.10 Vitamins and Minerals Vitamins Enable the body to produce energy from foods Two kinds of vitamins 1. Water-soluble 2. Fat-soluble Minerals Elements needed by body in very small amounts Body cannot manufacture minerals, so they must come from foods

11. © Copyright 2005 Delmar Learning, a division of Thomson Learning, Inc.11 Water Comprises about 60% of body weight Essential for survival Regulates body temperature Lubricates joints Transports nutrients and waste

12. © Copyright 2005 Delmar Learning, a division of Thomson Learning, Inc.12 Food Guide Pyramid Groups foods into five categories and gives recommended daily amounts of each Groups 1. Grains 2. Vegetables 3. Fruits 4. Milk 5. Meat and beans

13. © Copyright 2005 Delmar Learning, a division of Thomson Learning, Inc.13 Food Guide Pyramid

14. © Copyright 2005 Delmar Learning, a division of Thomson Learning, Inc.14 Food Safety Laws and inspections protect foods and food sources Foods can cause illness and death in two ways 1. Organisms invade foods and produce toxins (poisons) 2. Organisms use food as means of transport into the body Preventing food-borne illness

15. © Copyright 2005 Delmar Learning, a division of Thomson Learning, Inc.15 Summary Eating should be planned to supply the necessary nutrients for your body Package labels provide important information about foods It is important to handle foods safely to prevent illness