Yr 9 Blood vessel

What type of blood do all arteries, except one, carry?

• Deoxygenated blood

• Oxygenated blood

• Carbonated blood

• Nutrient-rich blood

What is the function of the muscle in artery walls?

• Regulate blood pressure

• Increase blood flow

• Transport oxygen

• Decrease blood flow

What is the main function of veins in the human body?

• Carry nutrients to cells

• Supply oxygen to organs

• Return blood to the heart

• Regulate blood pressure

What is the purpose of valves in veins?

• Regulate oxygen levels

• Increase blood pressure

• Prevent blood from falling back

• Control blood flow to organs

What is the function of capillaries in the body?

• Supply oxygen to organs

• Regulate blood pressure

• Carry deoxygenated blood

• Exchange materials between cells and blood

What is the main difference between arteries and veins?

• Arteries have thin walls, veins have thick walls

• Arteries carry oxygenated blood, veins carry deoxygenated blood

• Arteries have low blood pressure, veins have high blood pressure

• Arteries have valves, veins do not have valves

Why do capillaries have thin walls?

• To regulate blood pressure

• To minimize the distance for efficient exchange of substances

• To carry oxygen to cells

• To increase blood flow

What is the purpose of interstitial fluid surrounding capillaries?

• Increase blood flow rate

• Transport nutrients to organs

• Regulate blood pressure

• Facilitate substance exchange between blood and cells

What is the significance of capillaries having a large surface area?

• Provides a large area for exchange to occur

• Carries deoxygenated blood

• Increases blood pressure

• Regulates oxygen levels in the blood

Why is the speed of blood flow in capillaries very slow?

• The capillary walls are thick

• The lumen of a capillary is wider than the width of a red blood cell

• The lumen of a capillary is less than the width of a red blood cell

• The capillaries have valves