The oxygenated blood travels away from the heart in what?

Answer 1

Lungs

Answer 2

Arteries carry oxygenated blood while veins carry deoxygenated blood. However, there is a naming problem with the pulmonary artery and pulmonary veins -- they are backward. The pulmonary arteries carry the blood from the heart to the lungs, and the pulmonary veins carry the blood back from the lungs to the heart. So the answer to your question is that the oxygenated blood first returns to the heart via the pulmonary veins, passes through the left atrium, past the AV valve, into the left ventricle, and out through the aortic valve into the ascending aorta. From there the oxygenated blood flows to every organ in the body, exchanging O2 of CO2 at the capillaries.

Answer 3

As blood leaves the heart it travels through the arteries. The first one will be either the pulmonary artery (for blood leaving the right side of the heart) or the aorta (for blood leaving the left side of the heart).