<P> They are roughly grouped as arterial and venous , determined by whether the blood in it is flowing away from ( arterial ) or toward ( venous ) the heart . The term `` arterial blood '' is nevertheless used to indicate blood high in oxygen , although the pulmonary artery carries `` venous blood '' and blood flowing in the pulmonary vein is rich in oxygen . This is because they are carrying the blood to and from the lungs , respectively , to be oxygenated . </P>
<P> They are roughly grouped as arterial and venous , determined by whether the blood in it is flowing away from ( arterial ) or toward ( venous ) the heart . The term `` arterial blood '' is nevertheless used to indicate blood high in oxygen , although the pulmonary artery carries `` venous blood '' and blood flowing in the pulmonary vein is rich in oxygen . This is because they are carrying the blood to and from the lungs , respectively , to be oxygenated . </P>
name the type of blood vessels which carry blood from organs to the heart
name the type of blood vessels which carry blood from organs to the heart
venous
venous