1) lung a) b) firefighter 2) two lungs a) b) 3) kidney a) helicopter b) 4) kidney a) b) 5) blood a) b) 6) blood a) b) 7) mouth a) b) 8) mouth a) b) 9) The circulatory system transports ___________ around the body a) blood b) flower 10) The circulatory system transports ___________ around the body a) blood b) car 11) Without our ____________ to breathe, we can’t live a) shoes b) lungs 12) Without our ____________ to breathe, we can’t live a) head b) lungs 13) When we breathe in, _________ is taken into our lungs. a) oxygen  b) carbon dioxide 14) The respiratory system consists of a nose, a windpipe and _____ . a) flower b) two lungs 15) The _____ belongs to the urinary system. a) kidney b) car

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