Final answer:
Veins have the lowest blood pressure among the listed vessels due to their thin-walled structure and low-pressure flow. The answer is option A.
Step-by-step explanation:
Veins have the lowest blood pressure among the vessels listed. Veins are thin-walled vessels with large and irregular lumens. They have low-pressure flow and are equipped with valves to prevent backflow and promote unidirectional blood flow toward the heart. They are equipped with valves to ensure unidirectional blood flow and have a pressure of no more than 10 mm Hg.
Veins are blood vessels that carry deoxygenated blood back to the heart. They have thinner walls and contain valves to prevent backflow, aiding in the return of blood to the heart. When blood flows through veins, it is under very little pressure, usually no more than 10 mm Hg.