Why do we yawn?
Question:
Answers:
coz we need more oxigen
Other Answers:
your brain is lacking oxygen
due to lack of oxygen
Simply because we are bored or fatigued. Yawning makes us more alert because of the slow inhalation of oxygen.
Yawning is a method for communicating to other individuals your physiological state of being tired. It is believed that the yawn was used to signal to the pack or tribe that it was time to sleep. As humans have evolved, yawning has lost its significance.
oxygen to the brain
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