The cavity of the heart
The cavity of the heart is divided into four chambers : the right atrium, the atrium dextrum, the right ventricle, the ventriculus dexter, the left atrium, the atrium sinistrum, and the left ventricle, the ventriculus sinister.
Atrial cavities are separated from each other by the interatrial septum, septum interatriale, the ventricular cavity - interventricular septum, septum interventriculare; The position of the latter corresponds to the anterior surface of the heart and the posterior interventricular grooves.
Between the atria and ventricles distinguish the atrioventricular septum, septum atrioventricular.
The atria communicate with the corresponding ventricles of the heart via the atrioventricular orifices, ostia atrioventricularia: the right atrium with the right ventricle through the right atrioventricular opening, the ostium atrioventriculare dextrum, the left atrium with the left ventricle through the left atrioventricular orifice, ostium atrioventriculare sinistrum.
When studying the heart chambers, it is necessary to take into account the difference between the PNA terms defining the heart surfaces and the notations used in clinical medicine and pathomorphology to describe the walls of the heart chambers themselves.
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