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Biology
Paper 1
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Created by
Neyo Osoba
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Cards (16)
What are the main components of the circulatory system?
Heart
,
blood vessels
, and blood
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What type of circulatory system do humans have?
Double
circulatory system
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What is the main artery that carries blood away from the heart?
Aorta
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Which chamber of the heart receives blood from the body?
Right atrium
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Which chamber of the heart receives blood from the lungs?
Left atrium
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What happens to blood when the atria contract?
Blood goes into the
ventricles
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What occurs when the ventricles contract?
Blood pumps out of the
heart
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Through which arteries does blood exit the heart?
Pulmonary artery
and
aorta
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What are pacemakers in the heart?
Cells that control the
heartbeat
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Where are pacemakers located in the heart?
In the front
atrium
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What do pacemakers produce?
Electrical impulses
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What do electrical impulses from pacemakers cause?
Heart
to contract
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What is an artificial pacemaker?
A device implanted to
regulate heartbeat
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How does an artificial pacemaker work?
It sends
electrical currents
to the
heart
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What do coronary arteries supply to the heart?
Oxygenated blood
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Why is oxygenated blood important for the heart?
It provides energy for
heart function
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