1) Air enters our body though the  a) mouse b) nose and mouth c) teeth 2) Below the lungs, there is a muscle called  a) lungs b) trachea c) diaphragm d) bronchi 3) When we breathe, air goes through a tube called the a) trachea b) bronchi c) mouth d) lungs 4) The largest organ in the respiratory system a) nose b) lungs c) trachea 5) It is a group of organs that help us breathe a) Circulatory system b) Reproductive system c) Digestive system d) Respiratory system 6) We breathe in _______ a) Oxygen b) Carbon dioxide 7) We breathe out ______________ a) Carbon dioxide b) Oxygen 8) Which part is NOT in the respiratory system? a) Stomach b) Lungs c) Nose d) Trachea 9) What is the correct way to say "bronchi"? a) "brawn-chee" b) "bronc-eye" 10) What part is in the respiratory system? a) Stomach b) Pharynx c) Liver d) Intestines

RESPIRATORY SYSTEM- 4th grade

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