AP BIOLOGY

Detailed explanation-1: -Almost all arteries transport oxygenated blood and almost all veins carry deoxygenated blood. The only exceptions to this rule are the pulmonary artery (which carries deoxygenated blood from the heart to the lungs) and the pulmonary vein (which carries oxygenated blood from the lungs to the heart).

Detailed explanation-2: -In general, the arteries are shown in red and the veins in blue. The exception is the pulmonary circulation system that includes the left and right pulmonary veins that carry the oxygenated blood from the lungs (red) to the left antrum.

Detailed explanation-3: -The pulmonary arteries and veins carry deoxygenated blood, and they are typically colored blue on models to reflect this fact. In contrast, the rest of the arteries in the body carry oxygenated blood and are colored red to reflect this fact.

Detailed explanation-4: -Your pulmonary arteries carry blood from your heart to your lungs. They’re the only arteries in your body that carry oxygen-poor (deoxygenated) blood. Your main pulmonary artery (pulmonary trunk) leaves your right ventricle at your pulmonary valve.