Why do we yawn easily after producing so much carbon dioxide in our bodies?

Because the amount of oxygen supplied to the brain is reduced, the brain goes into a dormant state.

Mainly because carbon dioxide is the breath we exhale.

Because this carbon dioxide is removed by yawning.

Because the carbon dioxide needs to be removed.

Because at this time, the oxygen supply to the brain is insufficient.

Because carbon dioxide can make people more sleepy.

This has something to do with the oxygen supply to the human brain.

Oxygen makes a person awake, carbon dioxide is the opposite.

Because this carbon dioxide causes people to yawn and react.

It's like eating too many carbohydrates, so you want to sleep.

Why do people yawn? - The brain is in a state of hypoxia, and it reactively exhales carbon dioxide and inhales a lot of air.

How is yawning contagious? - This question is a little more complicated, let's talk about it in two points: first, the concept of infection should be clear, since it is contagious, then the premise is that the infected person must be a susceptible group, that is, the infected person is also sleepy, or has a tendency to be sleepy.

If you are alive and vigorous at the moment, then no matter how much the people around you yawn at you, I am afraid you will not be infected. Secondly, the transmission route should be visual, auditory, and the other one, which should be called carbon dioxide receptors in the body, these three pathways. The first two are mainly used to have a "psychological suggestion" effect on the infected person, which belongs to the psychological level of infection, and the latter is that the yawning person exhales a large amount of carbon dioxide, and the infected person inhales it, which directly causes the carbon dioxide concentration level in the body to reach the threshold of yawning, this theory may be easier to explain why we are more susceptible to yawning infection indoors than outdoors.

After busy work, intense exercise, or long hours of study, people have consumed a lot of energy, so they also produce a lot of carbon dioxide. When there is too much carbon dioxide, we must add more oxygen to balance the body's needs, but our lung capacity is limited, so even if we bring in oxygen every breath, we still can't replace the carbon dioxide in our body, and there will always be some residue. After a long time, these residual carbon dioxide begin to affect the functional activities of our body, making us feel close to suffocation, and then the body will send out a protective response, so we yawn.

Yawning is a special act of deep breathing, which is produced by the action of internal functional reflexes. When we yawn, when we inhale hard, our lungs expand greatly beyond their normal capacity to bring in a large amount of oxygen. Then when you exhale deeply, your lungs will contract as hard as you can to expel a lot of carbon dioxide, which is the effect of yawning.

Yawning is contagious, and when you see someone yawning, you can't help but yawn.

Why do you follow when someone yawns? Is yawning really contagious?

Yawning is an instinctive reaction of the human body, which, like heartbeat and breathing, is not controlled by the human will. It has a good protective effect on protecting brain cells, increasing the oxygen supply to brain cells, and improving the body's ability to cope with stress.

Yawning is a phenomenon of hypoxia in the brain, which tells you that it is time to rest and reduce the amount of oxygen you supply, so the purpose of opening your mouth wide is to inhale oxygen quickly.

First of all, it is an instinctive reaction of animals, and small animals such as cats and birds at home will yawn with their mouths; Secondly, the signal that yawning makes the brain lack oxygen, which is essentially a deep breath, and opening your mouth wide will naturally allow you to breathe in more fresh air.

When you hang out with your buddies and they go to pee when you pass by the toilet, do you have a little bit of a sense of going!