whenever we feel drowsy or sleepy, we start yawning. does yowing help us in any way explain
Answers
Answer:
When we are sleepy or feel drowsy, we yawn because our brain cells lack sufficient amount of oxygen. The deep breath associated with yawning helps us to drawn in more oxygen and supply the much needed oxygen to the tired body organs including the brain..
Explanation:
We all yawn, and we all see other people yawn.At a basic physiological level, a yawn is a big intake of air to the lungs. The mouth and jaw open wide. Through the mouth and nose, there’s a deep inhale followed by a slow exhale.
Yawning is an involuntary act—we don’t decide whether to yawn, we just yawn. As we all know, stopping a yawn is tough to do, even when a yawn is embarrassing or socially awkward.
Cooling the brain. There’s been a lot of recent interest in this theory of yawning, which suggests that yawning is a way the body regulates brain temperature. Regulating brain temperature keeps the brain working effectively, and lowering brain temperature helps stimulate alertness, supporting attentiveness, vigilance and other cognitive functions. Temperature regulation might be why we yawn most often first thing in the morning and at the end of the day. Temperature changes in the body are an important part of transitioning between sleep and wakefulness.
Research shows brain temperature does fall after yawning—and that yawning happens less often in colder temperatures than warmer ones. (So, less yawning on a chilly winter day than a steamy summer one.) Yawning triggers blood flow to the brain and its surrounding areas of the head, neck, and face, which pulls heat from the skull.