Circulation in the blood vessels

Question 1

arteries

Answer 1

vessels that carry blood away from the heart

Question 2

veins

Answer 2

vessels that carry blood towards the heart

Question 3

capillaries

Answer 3

tiny vessels that spread throughout the tissues of the body

Question 4

lumen

Answer 4

the central space inside the blood vessel

Question 5

arterial system

Answer 5

the system of arteries in the body

Question 6

arterioles

Answer 6

the very smallest branches of the arterial system, furthest from the heart

Question 7

peripheral arteries

Answer 7

arteries further away from the heart but before the arterioles

Question 8

venules

Answer 8

the very smallest branches of the venous system, furthest from the heart

Question 9

inferior vena cava

Answer 9

the large vein that carries the returning blood from the lower parts of the body to the heart

Question 10

superior vena cava

Answer 10

the large vein that carries the returning blood from the upper parts of the body to the heart

Question 11

venous system

Answer 11

the system of veins in the body

Question 12

semilunar valves

Answer 12

half-moon shaped, one way valves found at frequent intervals in veins to prevent the backflow of blood