1 - Nutrition

2 - Respiration – The Energy Releasing System

3 - Transportation – The Circulatory System

4 - Excretion – The Wastage Disposing System

5 - Coordination – The Linking System

6 - Reproduction – The Generating System

7 – Coordination in Life Processes

8 – Heredity – From Parent to Progeny

9 – Environment – Our Concern