wat is a yawn? we yawn lots and it sympithises we r tired but why do we yawn? wat is it? thanks for your anwsers.
(ps i cant spell today lol)
- 1 decade agoFavorite Answer
Yawning is cause by a lack of oxygen to the brain.
It can also be triggered as a psychological response to outside stimuli (IE: another person yawning.)
- DimplesLv 61 decade ago
A yawn is to open the mouth somewhat involuntarily with a prolonged, deep inhalation and sighing or heavy exhalation, as from drowsiness or boredom.
- 1 decade ago
We yawn because we are tired or sleepy. it is one way of the body reacting to these situations.Source(s): Kisii community