Understanding Blood Vessel Structure

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

• To carry blood towards the heart

• To carry blood away from the heart

• To exchange gases and nutrients with tissues

• To store blood

Which of the following blood vessels has the thickest walls?

• Capillaries

• Veins

• Arteries

• Venules

What is the main role of capillaries in the circulatory system?

• To transport oxygenated blood

• To exchange nutrients and waste products with tissues

• To regulate blood pressure

• To store blood

Which blood vessels are primarily responsible for regulating blood flow into capillary beds?

• Arteries

• Veins

• Arterioles

• Venules

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

• To carry blood away from the heart

• To carry blood towards the heart

• To exchange gases and nutrients with tissues

• To regulate blood pressure

Which of the following blood vessels contains valves to prevent backflow of blood?

• Arteries

• Capillaries

• Veins

• Arterioles

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

• To carry blood away from the heart

• To carry blood towards the heart

• To collect blood from capillaries

• To regulate blood pressure

Which blood vessels are known as resistance vessels due to their role in regulating blood pressure?

• Arteries

• Veins

• Arterioles

• Capillaries

What is the main structural difference between arteries and veins?

• Arteries have thicker walls and no valves

• Veins have thicker walls and no valves

• Arteries have thinner walls and valves

• Veins have thinner walls and valves

Which of the following is a characteristic feature of capillaries?

• Thick muscular walls

• Large diameter

• Thin walls for diffusion

• Presence of valves