the Anser is arteries
Veins. And the pulmonary artery.
The pulmonary artery carries oxygen poor blood and the pulmonary vein carries oxygen rich blood.
Veins are the blood vessels that usually carry oxygen-poor blood. The exception is the pulmonary vein, which carries oxygenated blood.
pulmonary artery
Oxygen poor. It carries oxygen poor blood from the right ventricle of the heart to the lungs to be oxygenated.
veins
In the leopard frog heart, the right atrium carries oxygen poor blood and the left atrium carries oxygen rich blood.
pulmonary vein
it carries blood toward the heart >apex<
Systemic veins, not to be confused with pulmonary veins, carry oxygen poor blood back to the heart.
The pulmonary artery carries oxygen-poor blood. The pulmonary vein carries oxygen-rich blood.
An Artery caries Oxygen Rich blood and a Vein carries Oxygen Poor blood, but not by definition because the Pulmonary Arteries carry Oxygen Poor blood and the Pulmonary Veins carry Oxygen Rich blood, (these vessles can be found between the heart and the lungs).
The pulmanary artery carries oxygen poor blood.