The cilia of the respiratory epithelium beat in concert cranially, effectively moving secreted mucus containing trapped foreign particles toward the laryngopharynx, for either expectoration or swallowing to the stomach where the acidic pH helps to neutralize foreign material and micro-organisms.
42.
It debunks the myth that pearls are created when a grain of sand becomes lodged in a shell, explaining that any foreign particle from a trapped fish to a parasite can serve as the nucleus for the shell's mantle tissue to secrete nacre around.
43.
The growth rate of the entire face is determined by the driving force ( level of supersaturation ) at the point of emergence of the predominant point of growth ( e . g . a dislocation, a foreign particle acting as catalyst, or crystal twin ).
44.
Several cats try to steal the mouse, using salesman ( " Good day, Sir, I represent the Little Giant Vacuum Cleaner Company, Walla Walla, Washington and if you watch closely, you'll notice the powerful action of this machine as it removes completely and forever all foreign particles from around the room.
45.
A floppy disk is a disk storage medium composed of a disk of thin and flexible magnetic storage medium, readable by a floppy disk drive ( FDD ), and sealed in a rectangular plastic carrier lined with fabric which serves the purpose of keeping the data storage disk free of foreign particles such as dust.
46.
In 2012 the AQA perla water softening system was voted Best Product of the Year 2013, and the E1 Single Lever filter filter ( a drinking water filter that prevents foreign particles and contaminants from entering the domestic system through the pipe network and damaging the installations ) received the same accolade in 2013.
47.
In the human respiratory system, mucus aids in the protection of the lungs by trapping foreign particles that enter them, in particular, through the nose, during normal breathing . " Phlegm " is a specialized term for mucus that is restricted to the respiratory tract, whereas the term " nasal mucus " describes secretions of the nasal passages.
