Starter quiz
- Which chamber does blood first enter the heart into from the lungs?
- right atrium
- right ventricle
- left atrium ✓
- left ventricle
- aorta
-
- Which of the following blood vessels carries blood at low pressure?
- arteries
- veins ✓
- capillaries
-
- Blood is pumped out of the right atrium into the right ______ before being pumped out of the heart.
- 'ventricle' ✓
- Which of the following statements are correct?
- The atria are the biggest chambers in the heart.
- The ventricles are at the top of the heart.
- The septum prevents oxygenated blood from mixing with deoxygenated blood. ✓
- The aorta take blood to the lungs.
-
- The tricuspid valve separates the ______ atrium and ventricle.
- 'right' ✓
- Place the following parts of the circulatory system in the correct order for blood flow starting at the lungs.
- 1⇔pulmonary vein
- 2⇔left atrium
- 3⇔left ventricle
- 4⇔aorta
- 5⇔muscles
- 6⇔vena cava
- 7⇔right atrium
Exit quiz
- Why does the heart make a ba-dum sound?
- to coordinate with the lungs
- contraction of atria then ventricles with a short pause in between ✓
- contraction of ventricles then atria with a short pause in between
- It represents the relaxation phase of the heartbeat.
-
- Which of the following does systole refer to?
- atria relaxing
- ventricles relaxing
- the contraction phase ✓
- blood filling up in the heart
-
- Which of the following is the best description of the cardiac cycle?
- the circulation of blood to the lungs
- the circulation of blood to the body
- the circulation of blood to the brain
- the sequence of events in a heartbeat, including contraction and relaxation ✓
- the division of left and right sides of the heart
-
- The relaxation phase of the cardiac cycle is known as ...
- 'diastole' ✓
- Match the following key terms and descriptions.
- cardiac cycle⇔the sequence of events in a heartbeat (contraction and relaxation) ✓
- systole⇔the contraction phase where blood is ejected from the heart ✓
- diastole⇔the relaxation phase where the heart fills with blood ✓
- Place the following stages of the cardiac cycle in the correct order, starting with the heart filling with blood.
- 1⇔The heart relaxes (called diastole) and fills with blood returning via the veins
- 2⇔The heart contracts (called systole) from the top chambers (atria) first.
- 3⇔The tricuspid and bicuspid valves open to allow blood down.
- 4⇔The tricuspid and bicuspid valves close to prevent backflow.
- 5⇔The ventricles contract ejecting blood from the heart into the arteries.
- 6⇔The next cycle begins with diastole (relaxation).
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- The cardiac cycle consists of two main phases: diastole and systole.
- Diastole is the phase when the heart chambers relax and fill with blood.
- Systole is the phase when the heart chambers contract and pump blood out at high pressure.
- The septum divides the left and right sides of the heart to prevent oxygenated blood mixing with deoxygenated blood.
Common misconception
The ba-dum of the heart beat represents the left then right side contracting.
The heart relaxes (diastole) to fill with blood then first phase of contraction squeezes blood from the top two atria down into the ventricles before the valves close off and then the second phase of contraction squeezes blood out of the ventricles.
Keywords
Cardiac cycle - the sequence of events in a heartbeat, including contraction and relaxation phases
Systole - when the heart is contracting causing ejection of blood
Diastole - when the heart is relaxing and filling with blood
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