<P> Veins are blood vessels that carry blood toward the heart . Most veins carry deoxygenated blood from the tissues back to the heart ; exceptions are the pulmonary and umbilical veins , both of which carry oxygenated blood to the heart . In contrast to veins , arteries carry blood away from the heart . </P>
<P> Veins are blood vessels that carry blood toward the heart . Most veins carry deoxygenated blood from the tissues back to the heart ; exceptions are the pulmonary and umbilical veins , both of which carry oxygenated blood to the heart . In contrast to veins , arteries carry blood away from the heart . </P>
the only veins that carry oxygenated blood are the
the only veins that carry oxygenated blood are the
pulmonary umbilical veins
pulmonary umbilical veins