A member asked:

Could shortage of oxygen cause yawning?

A doctor has provided 1 answer
Dr. Andrew Germanovich answered

Specializes in Pain Management

Yawning: Is present in most mammals and it's a defense mechanism in these species against a process called atelectasis, which is a collapse of some alveoli due to shallow breathing and weight of the lungs.

Answered 5/22/2019

4.7k views

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