He <span>is probably being treated for SLEEP APNEA.
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Sleep apnea is a sleep disorder that occurs when a person stops breathing during sleep. To prevents this patients can use <span>nasal masks, which blows air into the nose while sleeping.
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<span />This can happen a few times of even hundreds of times stopping the whole body from getting enough oxygen.
Chimneys are typically vertical, or as near as possible to vertical, to ensure that the gases flow smoothly, drawing air into the combustion in what is known as the stack, or chimney effect.
To absorb nutrients and help us grow and to get rid of harmful bacteria
New technology drive progress in many research fields,including cell biology.