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What does yawn mean?
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Mar 15, 2024 · When you yawn, a wetting agent known as a surfactant coats the tiny air sacs (alveoli) in your lungs, which helps keep them open. Although no one knows exactly why we yawn, new...
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to open the mouth wide and take a lot of air into the lungs and slowly send it out, usually when tired or bored: I can't stop yawning - I must be tired. Fewer examples. He yawned loudly in the middle of her speech. I was so tired, I couldn't help yawning. SMART Vocabulary: related words and phrases. yawn. noun. uk / jɔːn / us / jɑːn / [ C ]
Overview. What is yawning? Yawning is the opening of your airway and mouth to take a long, deep breath of air. It’s a complex muscular movement. In seconds, your entire airway fully dilates (expands). And surrounding muscles powerfully stretch or tense, most significantly around your throat (pharynx). Another term for yawning is oscitation.
The meaning of YAWN is to open wide : gape. How to use yawn in a sentence. to open wide : gape; to open the mouth wide and take a deep breath usually as an involuntary reaction to fatigue or boredom; to utter with a yawn…
A yawn is a reflex in vertebrate animals characterized by a long inspiratory phase with gradual mouth gaping, followed by a brief climax (or acme) with muscle stretching, and a rapid expiratory phase with muscle relaxation, which typically lasts a few seconds. [2][3] For fish and birds, this is described as gradual mouth gaping, staying open for...
Oct 10, 2023 · Some believe yawning is an arousal defense reflex occurring when people are bored or sleepy. Yawning might happen in lower states of consciousness, including the following: Before sleep. Upon awakening. Tiredness. Boredom. During a monotonous task. Medical conditions, such as multiple brain-stem ischemic strokes or frontal lobe tumors.
to open the mouth wide and take a lot of air into the lungs and slowly send it out, usually when tired or bored: I can't stop yawning - I must be tired. Fewer examples. He yawned loudly in the middle of her speech. I was so tired, I couldn't help yawning. SMART Vocabulary: related words and phrases. yawn. noun. us / jɑːn / uk / jɔːn / [ C ]
