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15 cards from this deck
Pumps blood throughout body in double circulatory system
Pulmonary and systemic circuits
Right atrium→right ventricle→lungs→back to heart
Left atrium→left ventricle→body→back to heart
Must pump blood to whole body, not just lungs
Four: two atria (upper) and two ventricles (lower)
Prevent backflow, ensure one-way circulation
Supply heart muscle with oxygenated blood
Around 70 beats per minute
Right atrium
Away from heart
Thick muscular walls, elastic fibres, high pressure
Towards heart
Wide lumen, low pressure, valves prevent backflow
One cell thick
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