Ensure your students understand how to interpret cardiac cycle pressure change graphs with this worksheet. Includes differentiated versions (one worksheet with blank boxes to explain the opening & closing of valves on the cardiac pressure graph & one gap-fill worksheet to help less confident students). Tests knowledge of why the atrioventricular and semilunar valves open and close during the cardiac cycle. how to calculate heart rate using a pressure change graph. the cardiac output equation. differences in pressure between atria & ventricles. Many other similar style worksheets available for other A-level Biology topics, including: tissue fluid formation transport of carbon dioxide protein synthesis photosynthesis respiration the kidney inheritance epigenetic modifications