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.
The Epiglottis function in respiratory system is a very important one. It is because of this cartilaginous structure that you do not choke while eating or drinking. It is because the Epiglottis shuts the entrance to the trachea that food and drinks are transferred to the digestive system.