Module 3: Exchange and transport (OCR A-level Biology A)

This bundle contains 18 detailed and engaging lessons which cover the following specification points in module 3 (Exchange and transport) of the OCR A-level Biology A specification:

3.1.1: Exchange surfaces

• The need for specialised exchange surfaces
• The features of an efficient exchange surface
• The structures and functions of the components of the mammalian gaseous exchange system
• The mechanism of ventilation in mammals
• The mechanisms of ventilation and gas exchange in bony fish and insects

3.1.2: Transport in animals

• The double, closed circulatory system in mammals
• The structure and functions of arteries, arterioles, capillaries, venules and veins
• The formation of tissue fluid from plasma
• The external and internal structure of the heart
• The cardiac cycle
• How heart action is initiated and coordinated
• The use and interpretation of ECG traces
• The role of haemoglobin in transporting oxygen and carbon dioxide
• The oxygen dissociation curve for foetal and adult haemoglobin

3.1.3: Transport in plants

• The structure and function of the vascular systems in the roots, stems and leaves
• The transport of water into the plant, through the plant and to the air surrounding the leaves
• The mechanism of translocation

As well as the detailed A-level Biology content of the PowerPoint slides, the resources contain a wide range of tasks including guided discussion points, exam-style questions and quiz competitions which will engage and motivate the students