When diving doubles you will need to use your wing/BCD to compensation. Typically you can't control your buoyancy only with a drysuit with steel doubles and stage bottles so you will need to use your wing to offset buoyancy.
The structure of the throat is designed to prevent food from entering the lungs. Photo Credit matthewennisphotography/iStock/Getty Images. When food enters the lungs instead of the esophagus, it affects breathing and can cause choking and other problems.
Ear, Nose and Throat. The epiglottis is a small flap of cartilage attached to the end of the tongue which closes during swallowing. This prevents food particles and secretions from entering the trachea and lungs. Epiglottitis is an infection of the epiglottis and surrounding tissue. The onset and progression of epiglottitis are rapid in children.