Relier Pairs Circulatory System ReviewVersion en ligne In this review, you will be matching the terms and definitions. par prachers 1 This type of blood vessel has thin walls to carry blood under low pressure 2 This type of blood vessel has THICK walls to transport blood under high pressure. 3 How do veins make sure blood keeps moving in only ONE direction? 4 What is the role of veins? 5 What is the role of the circulatory system? 6 What is the role of arteries? Circulate oxygen throughout the body and transport nutrients to cells Veins With the use of VALVES (e.g. tricuspid valve) Carry blood AWAY from the heart. Arteries Carry blood BACK to the heart.