What is the interpretation of yawning?

The wisdom of yawning is when the brain heats up, it sends signals to the lung by giving air in an emergency, so the lung responds by not having this amount of oxygen that the brain needs. It sends signals to the mouth by drawing air to be taken by the lung, and thus the brain takes what it wants from the oxygen and thus cools.

This process is an involuntary process that protects the brain