IGCSE Transport System in Human

Which type of blood vessel has a thick elastic wall?

• Veins

• Arteries

• Capillaries

What carries oxygen around the body?

• Plasma

• Red Blood Cells

• Platelets

• White Blood Cells

What causes the blood to be the distinct red colour?

• Haemoglobin

• Glucose

• Hormones

• Oxygen

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

• Artery

• Capillary

• Vein

• Ventricle

What is the function (job) of the platelets?

• To form clots (i.e. scabs) when you have cuts and grazes.

• To transport oxygen to the muscles

• To carry dissolved sugars.

• To produce antibodies

Which of the following is true of an artery?

One, some or all answers could be correct?

• it carries blood back to the heart

• it has a thick layer of elastic tissue

• it has a thin layer of muscle tissue

• it has a narrow lumen

Which of the following is true of an artery?

One, some or all answers could be correct?

• it carries blood at a high pressure

• it always carries oxygenated blood

• it carries blood away from the heart

• it has an outer layer of connective tissue

Which of the following is true of a vein?

One, some or all answers could be correct?

• it carries blood at a high pressure

• it always carries deoxygenated blood

• it carries blood away from the heart

• it contains valves

Arteries have a thick layer of muscle and elastic tissue.

Why is this important?

One, some or all answers could be correct?

• Prevents arteries from bursting due to high blood pressure

• Smooths out blood flow so it is in pulses

• Helps to force blood back to the heart

• Helps the artery to pick up oxygen

Which of the following is/are true of an arteriole?

One, some or all answers could be correct?

• It is a small artery

• It connects arteries to capillaries

• It contains smooth muscle that can contract and relax

• It controls blood flow to different organs by changing its diameter