2.5 Blood vessel structure

What is the primary function of arteries in the circulatory system?

• To carry blood away from the heart

• To carry blood towards the heart

• To exchange gases and nutrients

• To filter blood

Which of the following is NOT a type of blood vessel?

• Arteries

• Veins

• Capillaries

• Lymph nodes

Blood pressure ______ as blood moves away from the heart.

• increases

• decreases

• remains constant

• fluctuates randomly

Which blood vessel carries blood to the kidneys?

• Renal artery

• Hepatic vein

• Pulmonary artery

• Vena cava

Which layer is directly in contact with the blood in a blood vessel?

• Outer layer

• Muscle layer

• Endothelium

• Elastic layer

What is a characteristic feature of the lumen in arteries?

• Wide lumen

• Narrow lumen

• No lumen

• Variable lumen

Do arteries contain valves?

• Yes, always

• No, never

• Sometimes

• Only in large arteries

What is the main function of arteries?

• To carry blood away from the heart

• To carry blood to the heart

• To store blood

• To filter blood

Which blood vessel has valves to prevent backflow of blood?

• Arteries

• Capillaries

• Veins

• Arterioles

Label the types of blood vessels and their structure depicted in the image.

a

b

c

d

e

f

g

h

i

Thinner muscular wall

Lumen (A)

Artery

Endothelium (A)

Vein

Thicker muscular wall

Lumen (V)

Endothelium (V)

Valve