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Paper 3Theory (Core)2 marks
The mammalian heart is a vital organ responsible for pumping blood throughout the body.
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Components of the Heart
The heart consists of four chambers: two atria and two ventricles, separated by a septum. It has one-way valves to prevent backflow and coronary arteries that supply blood to the heart muscle.
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Identify List the four main components of the mammalian heart.
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