1) What is the function of the heart? a) Pump blood b) Transport blood c) Produce blood d) Store blood 2) Which component of blood carries oxygen? a) Plasma b) Red blood cells c) White blood cells d) Platelets 3) What is the role of white blood cells? a) Transport oxygen b) Fight infections c) Carry nutrients d) Form clots 4) What is the function of platelets? a) Fight infections b) Transport oxygen c) Form blood clots d) Carry nutrients 5) What substances are found dissolved in blood plasma? a) Oxygen b) Mineral salts c) Digested food d) Waste products e) Water 6) What features allow the red blood cell to transport oxygen efficiently? a) Biconcave shape b) Contains haemoglobin c) Inflexible cell membrane d) Round shape 7) Which vessel carries blood away from the heart? a) Vein b) Artery c) Capillary 8) Which vessel carries blood towards the heart? a) Vein b) Artery c) Capillary 9) Which blood vessel is the site of exchange of substances between blood and body cells? a) Arteries b) Veins c) Blood capillaries 10) How are blood capillaries adapted for the transport of substances? a) Thick walls b) Thin walls 11) What substances diffuse from the blood into body cells? a) Oxygen b) Carbon dioxide c) Digested food

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