Cardiac function
Presentation
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Biology
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11th - 12th Grade
•
Medium
Deanne Wilson
Used 10+ times
FREE Resource
12 Slides • 9 Questions
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Cardiac function
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
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The Cardiac Cycle
Systole - contraction of the heart muscle
Diastole - relaxation of the heart muscle
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The Cardiac Cycle
Pressure changes cause valves to open and close
Blood moves from area of high pressure to low pressure.
Atria contract = high pressure
AV valves open
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The Cardiac Cycle
Ventricles contract & atria relax = higher pressure in ventricles than atria
AV valves close to prevent backflow of blood to atria.
SL valves open
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The Cardiac Cycle
Ventricles relax = lower pressure than arteries
SL valves close to prevent backflow of blood to ventricles
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Conducting cycle of the heart
SA node = pacemaker.
Controls the rate at which the heart beats
AV node
Conducting fibres
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Multiple Choice
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Multiple Choice
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Calculations
Calculating heart rate.
Work out length of one cardiac cycle.
60 divided by length of one cardiac cycle = heart rate in BPM
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Calculate length of cardiac cycle
0.5 s
60/0.5 = 120 bpm
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Cardiac function
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