1) When we breathe, we take in .... a) oxygen b) nitrogen c) carbon dioxide d) hydrogen 2) The respiratory organ in the picture is called .... a) Lung b) Bronchioles c) Trachea d) Bronchi 3) Inhale means your lungs are ___________ air a) taking in b) letting out 4) Exhale means your lungs are ___________ air a) taking in b) letting out 5) What part of the respiratory system is this? a) Mouth b) Nose c) Lungs d) Heart 6) We breathe in carbon dioxide and breathe out oxygen a) True b) False 7) When we breathe in , oxygen enters the body through our mouth or .... a) Ears b) Skin c) Nose 8) The Respiratory System is the body's .... a) Breathing system b) Blood transporting system c) Food processing system 9) What is the purpose of nose hairs? a) Fight disease b) Keep dust/particles out of nose c) No purpose d) Tickle the nose so you sneeze 10) What muscle that help to make the lungs expand or shrink? a) lungs b) rib c) heart d) diapraghm 11) What are the tiny air sacs inside the lungs called? a) Alveoli b) Trachea c) Diapraghm d) Bronci 12) What are the correct order of organs used for breathing? a) Mouth & Nose - Alveoli - Trachea - Bronchioles b) Mouth & Nose - Trachea - Bronchi - Bronchioles - Alveoli  c) Trachea - Bronchi - Alveoli - Bronchioles

Respiratory System

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