Which blood vessel carries deoxygenated blood to the lungs?

• Pulmonary vein

• Aorta

• Vena cava

• Pulmonary artery

Which type of blood vessels carry blood back towards the heart?

Which blood vessels have walls which are one cell thick?

• Capillaries

• Veins

• Aorta

• Arteries

Which blood vessels have thick muscular walls to withstand the high pressure of the blood?

• Veins

• Arteries

• Capillaries

• Lymphatic vessels

What structures are found in veins to prevent the backflow of blood?

Which artery carries oxygenated blood away from the heart to the rest of the body?

• Pulmonary artery

• Aorta

• Coronary arteries

• Vena cava

Which blood vessel has the narrowest lumen?

• Pulmonary artery

• Pulmonary vein

• Hepatic vein

• Renal vein

On a complete journey around the body the blood passes through the heart how many times?

• 1

• 2

• 3

• 4

Where in the body does blood become oxygenated?

In which part of the blood do substances like glucose, ions and urea dissolve so they can be transported?