Concept:Arteries are blood vessels that transport blood from the heart toward the tissues.
Explanation:Oxygenated blood is pumped from the heart into the aorta, which then branches into arteries.
These arteries carry the oxygen-rich blood to the various tissues of the body.
The aorta is itself a single artery, so it is included under the general group of arteries.
Ventricles are heart chambers, and the lungs are organs, so they do not fit the term “vessel.”
Therefore, the class of vessels that directly supplies tissues with oxygenated blood is the arteries.
Answer:A. Arteries