Control of the Cardiac Cycle L.O: to list the three structures involved in controlling the cardiac cycle to describe how the cardiac cycle is controlled Starter: Complete the table below using the words ‘open’ or ‘closed’ Stage Atrioventricular valves Semi lunar valves Diastole Atrial Systole Ventricular Systole

Atrioventricular valves Cardiac Cycle Stage Atrioventricular valves Semi lunar valves Diastole Atrial Systole Ventricular Systole

Atrioventricular valves Cardiac Cycle Stage Atrioventricular valves Semi lunar valves Diastole Open Closed Atrial Systole Ventricular Systole

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Blood Pressure Systolic pressure is the pressure at which the blood leaves the heart through the aorta. Diastolic pressure is the minimum blood pressure in the aorta. Blood pressure can be measured with a sphygmomanometer: first reading is systolic and second is diastolic then represented as a fraction. Systolic Diastolic < normal < 100 < 60 Normal 100-139 60-89 Borderline 140-159 90-94 Hyper-tension >159 >94

Control of the Cardiac Cycle http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter22/animation__conducting_system_of_the_heart.html

Control of the Cardiac Cycle Three stages of the cardiac cycle are controlled by three structures:

Control of the Cardiac Cycle The three stages of the cardiac cycle are controlled by three structures: Sinoatrial node Atrioventricular node Bundle of His

Control of the Cardiac Cycle Write in your own words what happens during the cardiac cycle Use the heart structure worksheet to help you Use as many keywords / structures as possible!

Keyword Quiz! Unjumble the keywords about the heart to solve the hidden message at the bottom of your sheet!

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