GCSE Biology revision collection
Organisation and Body Systems
Follow the movement of materials through the digestive, breathing and circulatory systems, then connect their functions with health, disease and metabolism.
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Revision notes
Biological Organisation and Exchange
Connect cells, tissues, organs and systems, then explain why exchange surfaces and transport systems are needed.
Note 2.2Nutrition and a Balanced Diet
Revise nutrient functions, balanced diets, malnutrition and interpretation of food and health data.
Note 2.3The Digestive System
Trace food through the gut and connect mechanical digestion, chemical digestion and absorption.
Note 2.4Digestive Enzymes
Compare carbohydrases, proteases and lipases, their products, sites of action and practical investigations.
Note 2.5The Breathing System and Ventilation
Explain ventilation, alveolar gas exchange, exercise responses and the effects of smoking.
Note 2.6Blood
Learn how plasma, red cells, white cells and platelets transport materials and protect the body.
Note 2.7The Heart and Circulatory System
Follow double circulation, relate heart anatomy to function and calculate cardiac output.
Note 2.8Blood Vessels and Tissue Exchange
Compare arteries, veins and capillaries and explain how materials move between blood and cells.
Note 2.9Cardiovascular Disease and Treatment
Explain coronary heart disease and evaluate medicines, stents, surgery, transplants and artificial hearts.
Note 2.10Non-communicable Disease and Health
Connect lifestyle and environmental risk factors with disease while separating correlation from causation.
Note 2.11Cancer
Compare benign and malignant tumours and examine cancer risk, screening, diagnosis and treatment.
Note 2.12Liver and Metabolism
Explore how the liver processes nutrients, controls glycogen, forms urea and detoxifies harmful substances.