Heart, front view
The external structures of the heart include the ventricles, atria, arteries and veins. Arteries carry blood away from the heart while veins carry blood into the heart. The vessels colored blue indicate the transport of blood with relatively low content of oxygen and high content of carbon dioxide. The vessels colored red indicate the transport of blood with relatively high content of oxygen and low content of carbon dioxide.
Reviewed By: Dale Mueller, MD, cardiovascular and thoracic surgeon, HeartCare Midwest; Chairman Department of Cardiovascular Medicine and Surgery, OSF St. Francis Medical Center; and Clinical Associate Professor of Surgery, University of Illinois, Peoria, IL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.
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