Review

Transpiration: http://www.bbc.co.uk/schools/gcsebitesize/science/add_gateway_pre_2011/greenworld/planttransportrev2.shtml

Circulatory system  http://www.bbc.co.uk/schools/gcsebitesize/science/21c/keeping_healthy/heartdiseaserev1.shtml

Digestive system and enzymes http://www.bbc.co.uk/schools/gcsebitesize/science/add_edexcel/common_systems/digestionrev1.shtml http://www.bbc.co.uk/schools/gcsebitesize/science/add_gateway_pre_2011/living/dnaenzymesrev3.shtml

Osmosis http://www.bbc.co.uk/schools/gcsebitesize/science/add_ocr_gateway/green_world/diffusionrev3.shtml 