On our planet, there is no person who has never coughed and sneezed.Probably everyone felt discomfort when in conversation or, for example, laughter during the meal, the food gets into the respiratory tract or, as it is called, "the wrong way".The man immediately begins to cough.Approximately the same situation and with the nasal cavity - once we inhale any dust particles, we immediately start sneezing, and sometimes more than once!Of course, such a situation can not be called comfortable, but do not think about their uselessness.The fact is that the coughing and sneezing - it is a very useful protective functions of the body, without which we would have had a hard time.So let's see what it is, why people cough and sneeze.
Why people cough?
deep short breath after a fairly sharp accompanied by jerky exhale through the mouth - so you can describe our cough.This - the protective function of the body: from the mouth when coughing can fly, for example, undesirable for us the bread crumbs that fall, as
Why do people sneeze ?
Sneezing - is also a protective function of the body, relieves our nasal passages of mucus and various dust particles.In general, this occurs due to hairs, which completely cover the nasal passage, preventing the ingress of dust into the lungs and other undesirable muck.But what are the reasons why people sneeze?The causes of this protective reflex is complete, some of which may be unique to a particular person.For example, sometimes we sneeze from dust or noxious fumes that irritate the olfactory receptors of the nose.They start to tickle in the nose before the sneezing: foreign body caught in the nose, starts to irritate the nerve receptors, the signal goes to the brain that, in turn, sends a "team" to sneeze.The whole operation takes no less - of a second!Another reason why people often sneezes - a very bright light.This may be as a bright lamp and sunlight.
Why do people sneeze in the sun
is for certain to the question "why do people sneeze in bright light" - yet one can not answer.There are several reasons, one of which states that "the center of events" is the optic nerve and mucous membranes of the nose, directly associated with the nerves.When we look at a bright light, the momentum from the irritation of the pupil passed through the brain to the nerves of the nasal mucosa - sneezing occurs.According to another theory, our pupils are forced to drastically shrink in the sun, resulting in enhanced development of the lacrimal glands.Tears, in turn, entering the nose, irritating its mucosa, and again we sneeze.
Whatever it was, you know that, and coughing, sneezing, and we are only in favor.Never interfere with the natural processes of the body, trying hard to hold back the protective reflexes - sneeze and cough heartily!Be healthy!