Interfaces between body systems - 7th grade science

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Young learners struggle to visualize microscopic human anatomy, such as alveoli and villi. These tiny structures are difficult to see directly with current microscopes, which are not powerful enough. 2D images in textbooks or online cannot fully convey the details of these small features. In this 7th grade class, students created their own 3D models of body system interfaces to demonstrate features like immense surface area and how circulatory system capillaries support diffusion between systems.