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Internal structure

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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The internal structure of the heart revolves around four chambers which are adapted for the pumping of blood to and from the great vessels. Valves between the chambers, and between the great vessels and the chambers, ensure that there is a unidirectional flow.

A highly adapted electrical conduction system regulates the sequence in which the chambers contract. Further to this, a fibrous skeleton maintains the electrical independence of the atrial and ventricular chambers.


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