what does yawning means..

• funniegal

  13 Aug 07, 22:16

  i thought if you keep yawn.. means your just tired...wan to sleep, but a frend of mine, her mum say, she heard is due to lack of oxygen. hm.. wonder true bo
• euc

  13 Aug 07, 22:18

  Is your body response of releasing carbon dioxide.
• Darkness_hacker99

  13 Aug 07, 22:19

  Yawn
• Cool-gal

  13 Aug 07, 22:35

  lack of oxygen contributes yawning.
  smokers tend to yawn alot.
• funniegal

  14 Aug 07, 21:58

  Originally posted by euc:

  Is your body response of releasing carbon dioxide.

  means gd?
  
  
• Darkness_hacker99

  14 Aug 07, 22:01

  Originally posted by funniegal:

  means gd?
  
  

  It's a mechanism that prevent you from carbon dioxide poisoning. It's when the Carbon dioxide reaches a near critical level in your system.
• funniegal

  15 Aug 07, 09:19

  oh i see.....