Description
This unit covers the human circulatory system, its link to the gas exchange system, and the adaptations of the heart, blood vessels, and blood components. It explains transport mechanisms like diffusion, osmosis, and active transport, and the need for exchange surfaces in multicellular organisms.
This unit builds on pupils’ prior learning from Biological molecules and enzymes, where they explored the roles of molecules in cellular processes. It deepens their understanding by examining how the human body transports substances like gases and nutrients through specialised exchange surfaces, such as the lungs and intestines. This prepares pupils for the next unit, Coordination and control: the human nervous system, where they will apply their knowledge to explore how the body regulates these processes, emphasising the integration of transport and control mechanisms.
