Final answer:
Blood pressure is highest in arteries and lowest in veins. Arteries carry oxygenated blood away from the heart with higher pressure, while veins carry deoxygenated blood back to the heart with lower pressure.
Step-by-step explanation:
In the cardiovascular system, blood pressure is highest in arteries and lowest in veins. Arteries are responsible for carrying oxygenated blood away from the heart and have thicker walls that can withstand the higher pressure. Veins, on the other hand, carry deoxygenated blood back to the heart and have thinner walls, resulting in lower blood pressure.