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