Published 01/23 2008 04:18PM

Updated 07/28 2010 01:45PM

Atria: The upper chambers of the heart that pump blood to the lower chambers (ventricles).

Copyright 2016 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.

  • KARK 4 News
  • KARK 4 News
  • KARK 4 News Mobile App
  • Arkansas Storm Team Mobile App