1. Erythrocytes ~ Adaptations and explanation .[6 marks]
2. Function of blood in transport, focusing more on how oxygen and carbon dioxide is transported. [ 8 marks ]
3. Differences between arteries and veins in both STRUCTURE and FUNCTION.
4. The human heart- the chambers, the main blood vessels and the double circulatory system.
5.The body defence mechanism- the first, second and third line.
6. The third line defence which involve the production of antibodies by LYMPHOCYTES and relate it with lymphatic system.
7.Interpreting graphs of Natural active immunity, artificial active immunity and artificial passive immunity.
8. Transpiration: factors affecting such as temperature, light intensity, and air movement. The FACTS and EXPLANATION... (PAPER 3 too )
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