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Sinuses are apart of your upper respitory tract, but the upper respitory tract also includes the nasal cavity, the pharynx and the larynx. A sinus infection is just an infection in your paranasal sinuses.
The upper respiratory tract consists of all the parts above the larynx. This would include the throat, nasal cavity, sinus cavities, and the nose.
Food would get into your trachea (air pipe).
All openings of the body that led to the outside are moist with mucus. This includes the mouth and the rest of the digestive tract, the respiratory tract (including the nasal passages), the urinary tract and the reproductive tract. This mucus keeps the tracts from drying out. If they would dry out, microbes could get into the body and cause an infection. The mucus also produces easy passage of products into and out of them.
All openings of the body that led to the outside are moist with mucus. This includes the mouth and the rest of the digestive tract, the respiratory tract (including the nasal passages), the urinary tract and the reproductive tract. This mucus keeps the tracts from drying out. If they would dry out, microbes could get into the body and cause an infection. The mucus also produces easy passage of products into and out of them.
The upper respiratory tract humidifies inspired air. The value of PO2 then in the humidified air is mostly at 19. 7kPa (148mmHg).
The new born baby will get choked of the first feeding only. The milk will go the respiratory tract!
To catch debris that would otherwise settle in your lungs, the cillia catch debris on inhale, and allow it to exit via exhale.
Mucus and cilia. The dirt and other impurities that enter the respiratory tract are trapped by the mucus, in order not to enter the lungs and its structures. But the accumulation of too much mucus in the trachea would impede us from breathing, so the cilia sweep the mucus out of the trachea.
Anywhere except where things should be sterile. As far as our bodies, that would be our entire skin, in areas where anything moves into and out of the body. This the entire digestive tract, urinary tract, reproductive tract and respiratory tract. There should be none in the circulatory system (blood) nor in our muscles, nerves and brain. Bacteria there are bad news. The needle the doctor uses has been sterilized, the vaccine that you get is also.
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Bactrim is an anti-biotic, so would be used for infections.Bactrim Ds (Double Strength is an Anti Infective not an Antibiotic but is used to treat infections.