sira ulo ka
The epiglottis normally keeps this from happening.* How The Epiglottis Works:When you swallow, a small flap - called the epiglottis - briefly covers the top of the windpipe (or trachea) so that food goes the right way, into the digestive system, and not the wrong way, into the respiratory tract.The flap can't stay down all the time, or you would not be able to breathe! Sometimes a little food or liquid does get into the windpipe - perhaps if you ingest it very quickly - and that's when you cough to get it out again.When you swallow, the epiglottis should automatically cover the windpipe, so swallowing is a good way to suppress a cough if you are somewhere where you don't want to make a noise...
The thin folds at the top of the windpipe are called vocal cords. These are two small bands of muscle tissue that vibrate when air passes through them, allowing us to produce sound and speak.
The voice box (its not really shaped like a box), aka the larynx.
The glottis opens into the windpipe and is responsible for the production of sound. While the epiglottis is a cartilaginous flap on top of the glottis that prevents the food from entering the larynx. The main difference between glottis and epiglottis is their function and structure.
The opening into the top of the larynx is called the epiglottis. It is a flap of elastic cartilage that covers the larynx during swallowing to prevent food and liquids from entering the respiratory tract.
Food is kept out of the lungs by a structure in the throat called the epiglottis. It is a flap of skin found just above the vocal chords and larynx (the "windpipe") which leads to the lungs. When a person swallows, the epiglottis folds over top of the vocal cords and blocks off the larynx, preventing food from entering our lungs. Choking, the feeling of having something 'stuck' in your throat, or 'going down the wrong way' can happen because the epiglottis is ONLY a flap of skin that works upon a reflex. For a picture of the epiglottis go to: http://en.wikipedia.org/wiki/File:Gray1204.png (although I got this picture from Wikipedia, I did NOT receive my information from there)
bronchi
AnswerIt is called the upper labial frenulum.
No, they do not need any. The only valve that has anything to do with the lungs is at the top of the trachea (windpipe) and closes off the lungs when you swallow, it is called the epiglottis.
The epiglottis
Epiglottis
On the top of the engine (just left of centre) is a little black flap marked olio you need to pull that open.