What is yawning and how is it caused?
Answers
Answer:
Yawning is a mostly involuntary process of opening the mouth and breathing in deeply, filling the lungs with air. It's a very natural response to being tired. In fact, yawning is usually triggered by sleepiness or fatigue. Some yawns are short, and some last for several seconds before an open-mouthed exhale
Answer:
Explanation:
The most scientifically backed theory about why we yawn is brain temperature regulation. A 2014 studyTrusted Source published in the journal Physiology & Behavior looked at the yawning habits of 120 people and found that yawning occurred less during the winter. If the brain’s temperature gets too far outside of the norm, inhaling air can help cool it down.
You yawn when you’re because
tired your brain is slowing down, causing its temperature to drop
bored your brain isn’t feeling stimulated and starts to slow down, causing a temperature drop
seeing someone else yawn when you’re in the same environment as them, you’re exposed to the same temperature
Another reason you may yawn is because the body wants to wake itself up. The motion helps stretch the lungs and their tissues, and it allows the body to flex its muscles and joints. It may also force blood toward your face and brain to increase alertness.