IGCSE Biology / Blood and circulation

Arteries, veins and capillaries

Edexcel International GCSE Biology (4BI1), chapter 5: Blood and circulation, specification point 2.68. Part of the full course.

Read the revision notes · IGCSE Biology past papers

Arteries, veins and capillaries have different structures because they carry blood at different pressures and have different jobs. Linking each feature to its function helps you explain how blood moves and how substances are exchanged.

More lessons in Blood and circulation

• Why small organisms manage without a transport system and large ones cannot
• Double circulation
• The structure of the heart
• How the heart beats
• Coronary arteries and heart disease
• How heart rate changes during exercise and under adrenaline
• Adrenaline and the body's response
• Plasma, red cells, white cells and platelets
• Phagocytes, antibodies and clotting
• Vaccination, memory cells and the secondary response