Why do we yawn? And four other bodily functions explained
...Why do we yawn? One theory you may have heard of is that yawning aids your breathing, in that it allows more oxygen to enter your body, expelling excess carbon dioxide in the process....
https://www.bbc.co.uk/bitesize/articles/z63gpg8
Why Do We Yawn? - WebMD
...Yawning is a common reflex in which you open your jaw wide, take a deep breath, and then quickly breathe out. It lasts about 4-7 seconds and often happens when......
https://www.webmd.com/sleep-disorders/what-to-know-about-yawning
The Science of Yawning: Why Do We Yawn and What Does It Mean?
...Yawning is the involuntary action that makes our jaw go wide and the exhalation of the deep breath we take in while our mouth is open. Yawns are more likely to occur in moments of tediousness or drowsiness. If you see, hear, think about, or even read about it, it will trigger an urge to yawn....
https://www.psychologs.com/the-science-of-yawning-why-do-we-yawn-and-what-does-it-mean/
Yawn - Wikipedia
...It is commonly associated with tiredness, stress, sleepiness, boredom, or even hunger. In humans, yawning is often triggered by the perception that others are yawning (for example, seeing a person yawning, or talking to someone on the phone who is yawning)....
https://en.m.wikipedia.org/wiki/Yawn
Why Do We Yawn and Is It Contagious? - Healthline
...What does yawning say about you and your body? We?ll tell you why it happens, what it says about empathy, and how to stop yawning....
https://www.healthline.com/health/why-do-we-yawn
Why do we yawn? - New Scientist
...Yawning is an evolutionarily ancient reflex that we share with lots of animals ? not just mammals but also birds, reptiles and fish. Humans begin yawning in the womb at around 11 weeks......
https://www.newscientist.com/question/why-do-we-yawn/
Yawning Definition & Causes - Cleveland Clinic
...Yawning is a common but perplexing human function. Scientists have several theories for why we yawn, but none of them are certain. Common triggers of yawning include tiredness, boredom, waking up and stress. Seeing or hearing other people yawn can also cause you to yawn. What is yawning?...
https://my.clevelandclinic.org/health/body/yawning
Why Do We Yawn? Science Explains
...There are multiple reasons for yawning: When you?re tired or just waking up, yawning helps increase alertness by sending more oxygen to the brain. By redirecting blood flow in the face and body, it improves circulation to the brain and cools it....
https://sciencenotes.org/yawn-science-explains/
Reasons We Yawn: Why Is This Reflex Contagious? - Verywell Health
...There are several theories as to why people yawn. These include increasing oxygen to the brain, organs, and tissues, helping you stay awake, relieving inner ear pressure, and regulating body temperature....
https://www.verywellhealth.com/why-do-we-yawn-7966527
Why Do We Yawn? Physical and Psychological Reasons - ThoughtCo
...Scientists studying this reflex have proposed several reasons for the phenomenon. In humans, yawning appears to be caused by both physiological and psychological factors. Key Takeaways: Why Do We Yawn? A yawn is a reflex in response to sleepiness, stress, boredom, or seeing another person yawn....
https://www.thoughtco.com/why-do-we-yawn-4586495