Yes. After the right ventricle pumps the oxygen-poor blood to the lungs (through the pulmonary arteries), the pulmonary veins carry the oxygenated blood back to the left atrium of the heart.
Because blood vessels are classified by whether they lead into or away from the heart, the pulmonary veins are carrying oxygenated blood, whereas the pulmonary arteries carry deoxygenated blood from the right ventricle to the lungs.
The pulmonary artery carries oxygen poor blood and the pulmonary vein carries oxygen rich blood.
The right atrium and ventricle of the heart, as well as veins, contain oxygen-poor blood. The left atrium and ventricle, as well as the arteries, contain oxygen-rich blood. One exception to this is the pulmonary vein and artery, which are reversed - pulmonary artery contains oxygen-poor blood and pulmonary vein contains oxygen-rich blood.
poor
The pulmonary artery carries oxygen-poor blood. The pulmonary vein carries oxygen-rich blood.
Oxygen-poor blood
Systemic veins, not to be confused with pulmonary veins, carry oxygen poor blood back to the heart.
The vessel that conveys oxygen-poor blood from the right ventricle is called the pulmonary artery.
pulmonary artery
Oxygen poor. It carries oxygen poor blood from the right ventricle of the heart to the lungs to be oxygenated.
The pulmonary veins do not carry oxygen-poor blood to the right ventricle. Instead, the pulmonary veins carry oxygenated blood from the lungs to the left atrium of the heart.
In the circulatory system, deoxygenated blood is found on the right side of the heart, in the pulmonary artery, and in the systemic veins. The pulmonary artery brings low-oxygen blood to the lungs. The systemic vein carry deoxygenated blood from the body tissues to the right atrium.
I'm pretty sure that the frogs pulmonary artery carries oxygen poor blood to the lungs.