Methylene chloride is used as a solvent in paint strippers, as a propellant in aerosols, in the manufacture of photographic film, and as a process solvent in the manufacturing of drugs. In the research laboratory it is commonly used for extractions. It is also used as a metal cleaning and finishing solvent.
Expert: JamesStone replied 5 years ago. The trachea is reinforced with cartilage rings in order to keep the airway open. These rings reinforce the anterior and lateral sides, but are actually C shaped as opposed to complete rings which allows the trachea to constrict somewhat when swallowing food. As regards XXXXX XXXXX anatomical reason why most men have deeper voices than boys or women, it relates largely to the size of the larynx.
Tracheal stenosis is narrowing of the trachea, or windpipe. Tracheal stenosis causes shortness of breath, which is made worse during exercise.Noisy breathing can be heard when tracheal stenosis is severe.1  Scar formed from the tip of a breathing tube.reatment for tracheal stenosis enlarges the size of the airway, thus making breathing easier. In the operating room bronchscopy is performed with the patient asleep. Sometimes a laser is used to cut the narrowed portion of the airway from the inside.