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