Knowing Your Heart 2
Chambers - Our heart has four chambers - two superior atria (a'tre-ah) and two inferior ventricles (ven' tri-kls).
The internal partition that divides the heart longitudinal is called either - interatrial septum or interventricular septum , depending on which chambers it separates.
The right ventricle forms most of the anterior surface of the heart. The left ventricle dominates the inferoposterior aspect of the heart and forms the heart apex.
Atria- The Receiving Chambers
Except for small, wrinkled, potruding appendages called auricle, which increase the atrial volume somewhat, the right and left atria are remarkably free of distinguishing surface features.
Functionally, the atria are receiving chambers for blood returning to the heart from the circulation (atrium= entry way) because they need contract only minimally push blood "next door" into ventricle, the atria is relatively small, thin-walled chambers.
The internal partition that divides the heart longitudinal is called either - interatrial septum or interventricular septum , depending on which chambers it separates.
The right ventricle forms most of the anterior surface of the heart. The left ventricle dominates the inferoposterior aspect of the heart and forms the heart apex.
Atria- The Receiving Chambers
Except for small, wrinkled, potruding appendages called auricle, which increase the atrial volume somewhat, the right and left atria are remarkably free of distinguishing surface features.
Functionally, the atria are receiving chambers for blood returning to the heart from the circulation (atrium= entry way) because they need contract only minimally push blood "next door" into ventricle, the atria is relatively small, thin-walled chambers.
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