One for the editors?
The atria are filled by blood entering the heart through veins, not arteries. This is quite nicely described here http://www.geocities.com/jw31645/heart-n.html
Veins 'bring' blood to the heart, arteries 'take' blood away.
Dr Matthew Benson
Dept of Pharmacology
University of Oxford
Biting the hand that feeds IT
