Level 3 - Organisms
The Organisms level makes an obvious connection as many topics have something about cells or molecules in them, but in addition to this several concepts link topics together. The human body is an example of a concept which can connect many of the topics at this level. Within the theme of form and function there are three topics, B3.1 Gas exchange, B3.2 Transport and B3.3 Muscle and mobility which contain details...