MODEL
Cardiac cycle explorer
Scrub filling, contraction, ejection and valve states.
Model
Ventricular filling
Relaxed ventricles fill mainly passively from the atria.
Valves open and close passively because of pressure differences, rather than contracting themselves.
Atria
↓ AV valves: OPEN
Ventricles
↓ Semilunar valves: CLOSED
Arteries
A simplified left/right shared sequence. Stage spacing does not represent equal durations; real pressures and timings differ between sides.
Explain what you observed
Are all valves open during ejection?
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Connect this activity with your lesson notes and chapter practice.
Read a related learning guide →Practise Circulation →Open the student notes folder ↗Concepts and sources
Curriculum connections: 11.1, 11.2. Selected concepts.
Read the supporting source ↗PMDC curriculum ↗Questions and explanations are original teaching material; these are not official exam questions.