if yawning is caused by the brain’s need for oxygen, how does that relate to being tired?
In: Biology
When a person is at rest, like sitting on a couch, their breathing slows and becomes shallower as they dont need as much oxygen. When they get up, engage in conversation, or do anything that requires more energy then the body needs more oxygen for the increased function. Yawning is associated with being tired as people tend to be active throughout the day and not slow down until close to bedtime so yawning is seen as being tired. But if you’ve ever sat through a long lecture, or spent most of the day laying on the couch then you’ve probably yawned without necessarily being tired. It’s simply a way your body transitions from an inactive time to an active time.
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