The definition of yawning is an involuntary process that is performed by the human and the animal. Even the child in his mother's womb is wheezing although he does not breathe through the lungs. The aim of yawning is to fill the lungs with air as much as possible. The opening of the mouth is large where the size of the pharynx is four times larger than normal size at normal times, and the duration of yawning to six seconds and in these six seconds, contractions of the muscles of the neck and face with the closure of the eyes when performing yawning, and yawning on Open the Aosta channel Kios between the left ear and pharynx. It must be noted that when yawning is done, all sensory information is stopped for a period of time - the period that a person needs to yawn and isolates the person from his world for a certain period depending on the duration of the yawn.
Causes of yawn when feeling drowsy. When feeling bored and bored. The person leaps awake to alert him and make him alert because when yawning muscles contract the face, which leads to the rush of blood more force to the brain and that when moving the jaw wake our senses. The person is wheezing when the oxygen level is lower than the body's normal rate and the body's carbon dioxide is high. When you want to change a theme or escape from a particular subject. A reflex reaction that works to protect the lung from degeneration. Increase the activity of the body instead of idle and indicates the conflict between self and sleep on the one hand and between the body and the need to sleep on the other. Remove air from the lungs. Re-flow blood to the brain. When you feel hungry. When sleep time approaches. When relaxing and relaxing. When feeling tired and unable to do extra effort. When waking up from sleep. When feeling anxious and tense. The process of yawning is a very useful process for the body because it works to replenish the air, and improve the level and quantity of oxygen and carbon dioxide in the body, works to expand the lungs, and work to increase the effectiveness of joints and muscles and the heart, gives the body activity and a sense of vigilance, and yawning works to help the brain on Confronting changing attitudes. Yawning is considered to be a process of transmission from one person to another through infection, since it is enough for one person to yawn to spread yawning among others. It is enough for a person to think about yawning or reading about him until he begins to yawn.