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Closed Sawaal posted on August 19 at 12:16pm - Closed
 
siba043
siba043
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what's the reason of yawning???

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  Answers Total Answers: 3   Best Answer: pending Expert's Answers: 0
raghavjaimini
raghavjaimini
hw should i know??????????

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This answer was added on August 24 at 05:58pm
dolliee
dolliee
excess need of oxygen..

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This answer was added on August 19 at 09:28pm
harshikadavuluri
harshikadavuluri
Yawns are automatic reactions to the increased amount of carbon dioxide (CO2) in the blood.

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This answer was added on August 19 at 03:44pm
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