Lesson 14.4 Understanding Romantic Relationships .......................... 494 Lesson 14.5 Practicing Sexual Abstinence ........................................ 503 Chapter 15 Violence Prevention and Response ................................................. 514 Lesson 15.1 Bullying and Cyberbullying............................................ 516 Lesson 15.2 Sexual Harassment and Assault ..................................... 527 Lesson 15.3 Abuse and Neglect ....................................................... 537 Lesson 15.4 Violence in the Community ........................................... 547 Unit 6 Protecting Your Health ................................................................ 560 Chapter 16 Personal Safety ........................................................................... 562 Lesson 16.1 Preventing Accidents and Injuries .................................. 564 Lesson 16.2 Handling Dangerous Situations...................................... 572 Lesson 16.3 Being Safe on the Internet ............................................ 580 Lesson 16.4 Providing First Aid ....................................................... 592 Chapter 17 Environmental Health ................................................................... 608 Lesson 17.1 Understanding the Environment .................................... 610 Lesson 17.2 Identifying Environmental Hazards ................................ 616 Lesson 17.3 Protecting Your Environment ......................................... 629 Unit 7 Understanding Diseases and Disorders .......................................... 642 Chapter 18 Communicable Diseases ............................................................... 644 Lesson 18.1 What Are Communicable Diseases? ................................ 646 Lesson 18.2 Recognizing Communicable Diseases ............................. 654 Lesson 18.3 Preventing and Treating Communicable Diseases ............ 661 Chapter 19 Sexually Transmitted Infections and HIV/AIDS ................................... 672 Lesson 19.1 Common STIs .............................................................. 674 Lesson 19.2 Preventing and Treating STIs ......................................... 683 Lesson 19.3 HIV/AIDS .................................................................... 689 Chapter 20 Noncommunicable Diseases .......................................................... 700 Lesson 20.1 What Are Noncommunicable Diseases? .......................... 702 Lesson 20.2 Cardiovascular Diseases ................................................ 706 Lesson 20.3 Cancer ........................................................................ 715 Lesson 20.4 Other Noncommunicable Diseases ................................. 721 xi