Which structure(s) carry oxygen-rich blood away from the heart?

The correct answer is arteries.

Explanation:

The arteries are the blood vessels that carry the blood away from the heart. In general, the arteries carry oxygen rich blood to the tissues present in the body. from the arteries the blood is transferred to the capillaries, from the exchange of gases between blood and tissues take place. The blood in capillary after delivering oxygen and up taking carbon dioxide is transferred to the veins and oxygen deficient blood is carried back to the heart.

The pulmonary artery and pulmonary vein are exceptions. The pulmonary artery carry deoxygenated blood from the heart to lungs, whereas, the pulmonary vein carry oxygenated blood to the heart.  

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure