Name two functions of the nasal cavity mucosa:?
921707
1. It creates the boogers, and we all know how much fun we have when we pick our nose.\n2. It helps the economy by making people buy tissues (when the nose starts running). \n\nWhy don't you try to be a real student?
1163893
It is because the continuous flow of air can dehydrate an erode the mucosa. so the body has a mechanism to rehydrate the mucosa so it wont be damaged by the air flow\nthe way in which the body does this is by opening the blood flow through one nostril causing a normal swelling of the mucosa, this swelling prevents air from passing through there and at the same time provides water to the cells. then the same thing  happens on the other side.\nThe open side has a little less blood flow than the closed side. \nthey switch almost every 20 to 30 minutes \nbesides this the blood flow is designed to warm the air and humidify it although most of this humidification will take place in the trachea (windpipe) where there is water in vapor form.
1061348
The uvula has two functions:\n\n1) It helps us speak as it is used to help form certain sounds\n\n2) It folds upwards when we swallow to prevent food from getting into the nasal cavity (where the food could get stuck and cause infections)\n\n\nAs it's something that's used a lot more often than you'd think, I don't see it disappearing from human biology for a very long time indeed.
456067
The skin is the first line of defense. Mucus membranes in the nose and and cilia in the respiratory system also help to trap bacteria and 'sweep' it out of the body. The Immune system patrols the blood and lymph vessels of the body looking for intruders that make it past the first line of defense. Different cells in the immune system have different functions. Some cells (phagocytes) are ingest foreign invaders. Some cells are markers that flag foreign substances for attack by other immune system cells. \nHere's a few sources to help you better understand how the different immune system cells work together to protect the body.
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They are where your suppose to breath in and out of,but,many people also use their mouth wide open to breath,the nostrils have hair to try to keep out the bad you breath in,they can also do many medical test taking tubs up your nostrils without having to have an invasive surgery to reach certain organs like small intestines to do biopsies and other similar medical test!
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The skin deveolpes from the mesocarp of the fruit.  Not all biological features have a necssary function but I think in this case it will help keep the nut from drying out.
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Coughing serves the dual purpose of eliminating foreign particles from the wind pipe&lungs as well as preventing choking when the food we eat by mistake enters the windpipe instead of the foodpipe.\n\nSNEEZING on the other hand is just the body's way of throwing out foreign particles which have entered the nasal passage.
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squamous cells: function primarily in alveolar gas exchange and fluid balance. \ncuboidal cells: responsible for pulmonary surfactant secretion and metabolism.
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first: air is warmed by the rich vascular net in the nasal mucosa. Second, air is humidified by nasal secretions. Third, air is filtrated and some gross particles are captured by the endoturbinates, to prevent tehir entrance into the larynx.\n\nThe accesory muscles expand (internal intercostal)or contract (external interconstal)the thoracic box like a pump. that´s the way they help .\n\nCarbon monoxide is very dangerous because it has several times more affinity with the hem group of hemoglobyn than oxygen. So, in an environment rich in carbon monoxide, when inspirated it binds to hemoglopbyn, displacing oxygen molecules from the Hem group and  preventing them to reach the organs, causing tissue anoxia and sometimes death. Treatment involves oxygen therapy, and sometimes a hyperbaric chamber( a place with high concentrations of oxygen in the air, and at a higher atmospheric pressure).
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snot keeps ur nose clean\ni know it doesnt seem llike it but yah it does
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a sign of sinus infection/nasal cavity inflammation.
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A. Tissue linings of the respiratory system
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The sinus region  :-)
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Mucus and snot.  Also, things you breathe in through your nose.  If you are congested, you have many more boogers.
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Our olfactory glands (used for smelling) is located right above our nose, so when you have congestion, it is harder for the glands to sense the smell of foods and things. Taste sensation and smell sensation are very much integrated, so when you loose your ability to smell, your ability to taste is also reduced, making things taste like cardboard when you do have a cold.
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I found this which sort of explains it:\n\nSinus blockage usually occurs when there is an obstruction in the sinus openings, preventing air from entering the paranasal sinuses. We have four pairs of sinus cavities that assist in warming and filtering air that enters the nasal passages. Each of these cavities have a small opening called ostium attached to the nasal passages for free exchange of air and mucus. \n\nWhen excess mucus or thick infected mucus blocks these small openings (ostium), it irritates the linings in the nasal passages. \n\nThe mucus lining contains cilia (cells with fines hairs), responsible for sweeping mucus from the sinus cavities down the nasal passages for proper drainage. When the cilia become irritated by harmful bacteria, it becomes dysfunctional and allow infected mucus to stagnate inside the sinus cavity causing an irritation of the nasal linings. This irritation results in the swelling of the membranes and causes a blockage in the sinuses.
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Actually, I think we're thinking of this backwards.\n\nThe uvula is more likely to be an evolutionary remnant rather than a structure with a true purpose.  Early land animals probably had independent structures for breathing and eating (i.e. a distinct nasotracheal tube and a distinct pharyngoesophagus) as do modern ocean mammals like dolphins and whales.\n\nThe theory is that at some point (God know's why... and I'm sure He is the only one) the tubes crossed and coalesced into the nasopharyngeal cavity that humans now have.  The wall that once separated the tubes receded, the lower part becoming the epiglottis and the upper part becoming the soft palate and uvula.  \n\nThis also explains why the trachea is in front of the esophagus and the need for an epiglottis to even exist.  The soft palate and the posterior wall of the nasopharynx act as a barrier for food from going up the nose.  The uvula on the other hand literally just hung on for the ride.  ;)