Two pumps, one loop. Learn how blood moves through the heart, lungs, and body — what every chamber, valve, and vessel does, and why it matters at the patient's side.
The full lesson: the two-pump model, the pump cycle, the electrical system, a step-by-step walk of the loop, and the field logic that ties anatomy to assessment.
Open the lesson →The interactive diagram: animated blood flow, click any structure for detail, a guided flow tour, a click-to-identify quiz, and six clinical scenarios from PE to heart failure.
Launch the trainer →