Stock Photo - Model of the intern anatomy of the heart of an adult human body anterior view of a frontal section. The heart contains four cavities: two atriums in its upper part, and two ventricles in its lower part. Both ventricles are separated by a thick muscle w

Stock Photo: Model of the intern anatomy of the heart of an adult human body anterior view of a frontal section. The heart contains four cavities: two atriums in its upper.

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