The sinuses produce mucus that helps to moisturize the interior of the nose, according to Cedars-Sinai. Mucus traps dust, dirt, pollutants and microorganisms at the entry to the respiratory system and prevents their trav... More »

Brake calipers are important brake components that enable a vehicle to move slowly or stop when the driver steps on the brake. They are responsible for producing friction with the rotors by squeezing the brake pads on th... More »

Camper shells provide covers for the cargo beds of pickup trucks, allowing the beds to serve as sleeping areas and protecting cargo or passengers from the elements. Some camper shells also improve the aerodynamic charact... More »

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WebMD explains that the primary purpose of mucus is to coat the passageways of the nose, throat, sinuses, lungs and gastrointestinal tract and keep them from becoming dry. If these passages dried out, their surfaces coul... More »

According to BoogieWipes.com, boogers form because the sinuses and nose secrete mucus to prevent illness and infection by keeping dirt, dust and pollen from entering the lungs. Boogers can either be sticky or dry. More »

The sinus, or nasal cavity, serves to lighten the skull, to produce mucus, to warm and moisturize air breathed in through the nose and to serve as a chamber in which speech resonates. The sinus cavity is made up of four ... More »

Mucus comes from mucus-producing tissues found on the inner walls of the gastrointestinal tract, mouth, sinuses, nose, lungs and throat. Mucus is produced in these areas of the body in order to protect them and prevent t... More »