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epiglottis

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Epiglottis


Small flap located behind the root of the tongue in mammals. It closes off the end of the windpipe during swallowing to prevent food from passing into it and causing choking.

The action of the epiglottis is a highly complex reflex process involving two phases. During the first stage a mouthful of chewed food is lifted by the tongue towards the top and back of the mouth. This is accompanied by the cessation of breathing and by the blocking of the nasal areas from the mouth. The second phase involves the epiglottis moving over the larynx while the food passes down into the oesophagus.

© Research Machines plc 2008. All rights reserved. Helicon Publishing is a division of Research Machines plc.


 
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adenosine triphosphate
aerobic
aerobic respiration
alveolus
anaerobic respiration
ATP
breathing
bronchiole
bronchus
carbon dioxide
cilia
diaphragm (anatomy)
diffusion
energy (biology)
epiglottis
gas exchange
glucose
intercostal
lactic acid
lung
mucus
nicotine
oxygen
oxygen debt
respiration
respiratory tract
smoking (tobacco)
thorax
trachea
ventilation
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