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One of the most common reasons is because you are breathing through your mouth while you sleep. This most often happens when you have a cold.
while breathing
It goes up - surprisingly, while this practice induces unconsciousness, it is not due to lack of Oxygen - it is the overabundance of unremoved unwanted CO2 that makes One pass out.
It is customary to rise when the judge enters or departs the courtroom and when the jury enters and departs the court room. If you don't you may get a lecture from the judge and a cool place to sit for a while while you ponder the advisability of standing when directed. As a defendant, why would you even want to annoy the judge or jury who is going to decide your fate?
When light enters a glass block, it undergoes reflection and refraction. However at the glass air interface, refraction occurs to a larger extent than refraction and hence some of the light is reflected while the rest of it enters the glass block.
Because in the mountain range there have lack of oxygen for our breathing
normal breathing is nice and easy while breathing during an asthma attack is difficult and doesnt allow you to fully use your airways.
diaphragm
orthopnea
Nothing significant
While breathing only oxygen is absorbed, because hemaglobin in red blood cells selectively absorbs oxygen and not other gases.
You should check for signs of life every two minutes while performing rescue breathing on an adult or child