| Chapter 6 Food and humans | | |
| Chapter 6 Food and humans (2021 new questions) | | |
| Chapter 7 Nutrition in humans | | |
| Chapter 7 Nutrition in humans (2021 new questions) | | |
| Integrated Quiz 2 (Book 1B: Chapters 6–7) | | |
| Chapter 8 Gas exchange in humans | | |
| Chapter 8 Gas exchange in humans (2021 new questions) | | |
| Chapter 9 Transport of substances in humans | | |
| Chapter 9 Transport of substances in humans (2021 new questions) | | |
| Integrated Quiz 3 (Book 1B: Chapters 8–9) | | |