CHAPTER 1 The Human Body 12
1-1 TheBodyasaWhole 14
1- 2 Levels of Organization 15
CHAPTER 2 Skeletal and Muscular Systems 28
2-1 The Skeletal System 30
2-2 The Muscular System 37
2- 3 Injuries to the Skeletal and Muscular Systems 42
CHAPTER 3 Digestive System 50
3-1 The Importance of Food 52
3-2 Digestion of Food 61
3-3 Absorption of Food 69
3- 4 Maintaining Good Health 71
CHAPTER 4 Circulatory System 78
4-1 The Body's Transportation System 80
4-2 Circulation in the Body 82
4-3 Blood—The River of Life 88
4-4 Cardiovascular Diseases 96
CHAPTER 5 Respiratory and Excretory Systems 106
5-1 The Respiratory System 108
5-2 The Excretory System 118
CHAPTER 6 Nervous and Endocrine Systems 130
6-1 The Nervous System 132
6-2 Divisions of the Nervous System 137
6-3 The Senses 144
6-4 The Endocrine System 155
CHAPTER 7 Reproduction and Development 166
7-1 The Reproductive System 168
7-2 Stages of Development 177
CHAPTER 8 Immune System 190
8-1 Body Defenses 192
8-2 Immunity 197
8-3 Diseases 203
CHAPTER 9 Alcohol, Tobacco, and Drugs 214
9-1 What Are Drugs? 216
9-2 Alcohol 219
9-3 Tobacco 223
9-4 Commonly Abused Drugs 226
SCIENCE GAZETTE
Claire Veronica Broome: Disease Detective 236
Are Americans Overexercising? 238
The Bionic Boy 241
For Further Reading 244
Appendix A: The Metric System 245
Appendix B: Laboratory Safety: Rules and Symbols 246
Appendix C: Science Safety Rules 247
Glossary 249
Index 253
