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.
The trachea, commonly known as the windpipe, is a tube about 4 inches long and less than an inch in diameter in most people.The trachea begins just under the larynx (voice box) and runs down behind the breastbone (sternum).The trachea then divides into two smaller tubes called bronchi: one bronchus for each lung. A procedure called bronchoscopy is usually needed to remove a foreign body from the trachea. 2  Tracheal cancer: Cancer of the trachea is quite rare. 3  Symptoms can include coughing or difficulty breathing. 4  Tracheomalacia: The trachea is soft and floppy rather than rigid, usually due to a birth defect.