1) Which one is the respiratory system? a) b) c) d) 2) Which animal breathes with its lungs? a) caterpillar b) centipede c) zebra d) octopus 3) Which animal breathes with its skin? a) camel b) frog c) spider d) bird 4) Which system enables the body to exchange gases? a) respiratory system b) excretory system c) digestive system d) circulatory system 5) What do these organs help the body to do? a) eat b) move c) think d) breathe 6) What organ is P? a) lungs b) trachea c) heart d) esophagus 7) Which one of the following protects the lungs? a) skull b) backbone c) ribcage d) shin bone 8) Which organ is NOT used to breathe? a) lungs b) skin c) gills d) scales 9) When I inhale, my lungs become _______. a) smaller b) unchanged c) bigger 10) What part is B? a) alveoli b) trachea c) diaphragm d) bronchi 11) Which lung is smaller? a) the left lung b) the right lung c) two lungs are the same 12) In the picture, when you exhale, your body is ________. a) oxygen - rich b) oxygen - poor c) carbon dioxide - poor

Respitory system

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