Blood Vessels and Circulatory System

Which type of blood vessel carries blood away from the heart?

• Veins

• Capillaries

• Arteries

• Venules

What is the main function of capillaries in the cardiovascular system?

• To pump blood

• To transport oxygen

• To exchange nutrients, gases, and wastes between blood and tissues

• To store blood

Which blood vessel has the thickest walls?

• Veins

• Capillaries

• Arteries

• Venules

What is the function of veins?

• To carry oxygenated blood from the lungs to the heart

• To carry blood away from the heart

• To carry blood back to the heart

• To facilitate nutrient exchange

Which blood vessel has the smallest diameter?

• Veins

• Arteries

• Arterioles

• Capillaries

The pulse is a rhythmic expansion and contraction of which type of blood vessel?

• Veins

• Capillaries

• Arteries

• Venules

Which of the following is a characteristic of arteries?

• Thin muscular walls

• Large diameter

• Thin layer of endothelial cells

• High pressure

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

• Arteries

• Veins

What is the function of red blood cells in the blood?

• To fight infections

• To carry oxygen

• To help blood clot

• To regulate blood pressure

Which component of blood is responsible for clotting?

• Red blood cells

• White blood cells

• Platelets

• Plasma