1) What is the heart? a) bone b) tissues c) veins d) arteries e) organ 2) What does the lungs contain? a) Water  b) CO2 c) Oxygen d) Sulfur Dioxide e) Helium f) Blood 3) Where are red-blood-cells? a) bones b) muscles c) in your heart d) valves e) in your lungs f) veins 4) What pumps blood? a) Trachea b) Lungs c) Muscles d) Aorta e) Ventricles  f) Heart 5) Which of the options is not a blood vessel? a) Veins b) Pulmonary c) Artery d) Capillary e) Cappillary f) Cappilary 6) What does the heart pump blood to ? a) Limbs  b) Head c) Brain only d) Everwhere in body e) To blood cells f) To lungs only 7) What is a vein? a) Something flowing to your bones. b) Where blood flows through c) A blood vessels d) An artery e) A tube where you breathe from f) Another name for lungs. 8) What is another name for a trachea? a) pipetube b) tubepipe c) windpipe d) windtube e) bronchi f) alveoli 9) How long does it take for one circulation of blood? a) a blink of an eye b) 1 sec c) half a sec d) 2 sec e) quarter of a second f) 5 sec 10) What is released when you breathe? a) CO2 b) oxygen c) Carbon Dioxidic Acid d) Dioxidic acid e) SO2 f) water 11) What is the name of the largest artery ? a) Pulmonary valve b) Pulmonary Vein c) Alveoli d) Bronchi e) Trombone Vein f) Aorta

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