AP BIOLOGY

Detailed explanation-1: -Pulmonary veins are blood vessels that carry oxygen-rich blood from your lungs to your heart. Your pulmonary veins are part of your body’s pulmonary circuit. This is a system of blood vessels that moves blood between your heart and your lungs. This circuit also includes your pulmonary arteries.

Detailed explanation-2: -The pulmonary veins carry oxygenated blood from the lungs to the left atrium of the heart.

Detailed explanation-3: -Most veins usually carry deoxygenated blood from tissues back to the heart but exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. Oxygenated blood from the lungs is circulated back to the heart through the pulmonary veins that drain into the left atrium.