UPPER-HEART CHAMBERS Crossword Clue
UPPER-HEART CHAMBERS Crossword Clue
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Crossword Puzzle Infos
The term UPPER-HEART CHAMBERS is referring to the two upper chambers of the heart, which are known as the atria. The atria are responsible for receiving blood from the veins and pumping it into the ventricles. The atria are separated from the ventricles by a wall of muscle called the atrioventricular septum. The atria are also important in maintaining the heart's rhythm.