Duration Just Part of the Story. In theory a bond fund with a negative average duration should appreciate in value if interest rates rise. But fixed-income investors seeking protection from a rise in rates shouldn't consider duration alone in choosing a fund. Knowing what's in the portfolio is just as important.
Arteries form part of the circulatory system. They carry blood that is oxygenated after it has been pumped from the heart. Arteries also aid the heart in pumping blood. Arteries carry oxygenated blood away from the heart to the tissues, except for pulmonary arteries, which carry blood to the lungs for oxygenation.
In the systemic (body) circuit, arteries carry oxygenated blood and veins carry deoxygenated blood. In the pulmonary (lungs) circuit, the arteries carry deoxygenated blood while the veins carry oxygenated blood. You are correct in your description of what carries oxygenated blood in the pulmonary circuit.