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 veins? 2 What is the role of arteries? 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 What is the role of the circulatory system? 6 This type of blood vessel has thin walls to carry blood under low pressure Carry blood BACK to the heart. Circulate oxygen throughout the body and transport nutrients to cells Veins Arteries Carry blood AWAY from the heart. With the use of VALVES (e.g. tricuspid valve)