Monday, 10 December 2012

Work Sheet 3

1. The breathing organs of humans are the __________.
2. All living things can ___________.
3. ___________air contains more oxygen which is needed to produce energy.
4. ___________ air contains more carbon dioxide.
5. In human, the main organs involved in breathing are ______, lungs, nose and wind pipe.
6. Grasshopper has the same ___________ organ as the cockroach.
 
Answers
 1. lungs        2. breathe           3. inhaled             4. exhaled             5.mouth            6. breathing

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