In its simplest form, meringue is made up of just egg whites and sugar. The ratio of egg white to sugar and how you handle those two ingredients makes all the difference in the outcome. Use the right bowl. Make your meringue in a clean, dry bowl made of glass, ceramic, stainless steel, or copper.
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.
Carina of trachea. In anatomy, the carina is a ridge of cartilage in the trachea that occurs between the division of the two main bronchi. This occurs at the lower end of the trachea (usually at the level of the 4th thoracic vertebra, which is in line with the sternal angle, but may raise or descend up to two vertebrae higher or lower with breathing). This ridge lies to the left of the midline, and runs antero-posteriorly (front to back). Foreign bodies that fall down the trachea are more likely to enter the right bronchus. The mucous membrane of the carina is the most sensitive area of the trachea and larynx for triggering a cough reflex.