1) What is the function of your circulatory system? a) To transport materials and waste around my body. b) To make blood c) To bring carbon dioxide into my body d) To change my food into smaller nutrients 2) Where are your blood cells made? a) Inside my yellow marrow. b) Inside my red marrow in my long bones c) Inside my heart d) Inside my lungs. 3) Oxygen and Carbon dioxide get transported on your white blood cells. a) True b) False 4) Your whole blood is made of how many different parts? a) 2 b) 3 c) 4 d) 5 5) Which part of your blood is the liquid? a) white blood cells b) red blood cells c) platelets d) plasma 6) Which part of your blood clots your blood so you don't bleed to death? a) white blood cells b) red blood cells c) platelets d) plasma 7) Which part of your blood fights infections (viruses and bacteria)? a) white blood cells b) red blood cells c) platelets d) plasma 8) Are the dissolved nutrients, vitamins, and minerals you eat in your blood? a) Yes b) No 9) Your plasma is mainly made of a) water b) oxygen c) carbon dioxide d) glucose 10) The solid parts of your whole blood are a) platelets, plasma, red blood cells b) red blood cells, platelets, white blood cells c) white blood cells, platelets, plasma 11) We measure how fast your blood is moving in your blood vessels by taking your a) blood pressure b) pulse c) temperature d) heart rate 12) Which organ pumps your blood to your lungs and to your body? a) My stomach b) My heart c) My brain d) My diaphragm 13) My blood moves forwards and backward inside my blood vessels. a) True b) False 14) Which organs are the main parts of your circulatory system? a) heart, brain, lungs b) heart, blood, blood vessels c) blood vessels, stomach, small intestines d) Heart, blood, pancreas 15) Your right ventricle pumps blood to your a) body b) lungs 16) This muscle separates the right and left sides of your heart. a) atrium b) ventricle c) septum 17) The pumping chambers of your heart a) right and left atrium b) septum c) valves d) right and left ventricles 18) What is the tissue inside your heart that makes sure your blood does not flow backward? a) ventricles b) arteries c) valves d) veins 19) The part of your heart that pumps blood to your body a) right atrium b) right ventricle c) left atrium d) left ventricle 20) Arteries pump blood a) to the heart b) away from the heart c) they don't pump, they connect small capillaries 21) Your blood cells pick up O2 in your a) heart b) blood vessels c) lungs 22) Veins have valves in them because a) they carry blood to your heart, and you don't want all your blood in your feet b) they pump your blood away from your heart c) arteries have them too. 23) The thinnest and tiniest blood vessels are your a) arteries b) veins c) capillaries 24) Your blood is made a) in my lungs b) in my heart c) in the red marrow in my bones d) in the yellow marrow in my bones 25) The number of times your heart beats is called your a) temperature b) blood pressure c) pulse 26) Your heart is the size of a football. a) True b) False

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