Lesson 2: The Biological Pump (Cardiac Anatomy & Cycle)
Duration of Days: 4
Lesson Objective
Model the path of a red blood cell through the heart and identify the valves and chambers responsible for one-way flow.
How does the heart ensure blood only moves in one direction? What causes the "lub-dub" sound?
Atrium, Ventricle, AV Valves, Semilunar Valves, SA Node (Pacemaker), Systole, Diastole.
HS-LS1-2 (Subsystems)
Sequencing events in a complex process (the cardiac cycle) based on a technical description.
Description: A study of the heart’s four-chambered structure and electrical conduction system.
Purpose: To link mechanical pumping to electrical timing.
DOK 3.
Understanding the function of an AED (Automated External Defibrillator) in resetting a disorganized cardiac rhythm.
Thinking the left and right sides of the heart pump to the same place.
Heart Dissection (Sheep) for kinesthetic learners; 3D virtual heart tours for students who prefer digital models.
"The Cardiac Roadmap": Students must narrate a journey starting at the Vena Cava and ending at the Aorta, identifying every "toll booth" (valve) and "room" (chamber).
Sheep hearts, dissection tools, EKG sensors (if available).