As far as I know, the purpose of yawning isn’t really understood, but it’s present in nearly all land vertebrae. Maybe it’s a universal bug in the breathing animation code.
As far as I know, the purpose of yawning isn’t really understood, but it’s present in nearly all land vertebrae. Maybe it’s a universal bug in the breathing animation code.
Its actually pretty difficult to have inadequate blood oxygen if you have full functional lungs
You actually breath less when you sleep, so you yawn when you wake up to transition to a higher breathing state