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.
So food or water will not enter into your windpipe and breathing system (lungs). The food and water then avoid going down the windpipe because of this flap - the epiglottis aâ¦nd go into the digestive track - down the esophagus. 3 people found this useful.