MPH Science Textbook 5&6 - Systems 1.   The plant transport system       A. The plant transport system       B. Tubes for transporting   2.   Air and the respiratory system       A. All mixed up!       B. Human respiratory system       C. Animal respiratory system       D. Plant respiratory system        3.   The human circulatory system       A. The heart       B. The blood and the blood vessels       C. From parts to whole   4.   The unit of life       A. Cells       B. Different types of cells    5.   Electric circuits       A. Electrical systems       B. Symbols in an electric circuit       C. Closed and open circuits        6.   Using electricity       A. Number of batteries in series       B. Number of bulbs in series       C. Arrangement of bulbs in series and in parallel       D. Saving energy   7.   Conductors of electricity       A. Conductors and insulators       B. Using electric safely         Science today         Thematic concept map         Glossary