Overview
Open Foundations to learn the normal circulation route, distinguish blood pressure from forward flow, and read P, QRS and T as electrical events. Each lesson takes about three minutes and includes definitions, an observable live activity and a three-option knowledge check with explanatory feedback.
Replay, lesson navigation and Reset restore a complete normal reference before preparing the activity, so changes do not stack. The pressure–flow example sets systemic resistance to 1800 dyn·s/cm⁵ in the existing synthetic model; its response is not a universal patient prediction. The ECG activity pauses the same normal trace for pointer or keyboard inspection.
Versioned browser keys store only the current lesson location and completed lesson IDs. Answers and activity state are not saved; resuming prepares the lesson from its starting scene. The record contains no clinical or account data, storage failure is nonblocking, and progress does not synchronize across devices. For implementation details and limits, open How the model works.