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.
What is the structure difference of the esophagus and trachea? The esophagus is a smooth tube that when we eat food goes trough the esophagus to the stomach. The trachea (windpipe) is made of cartilaginous rings that when we inhale/exhaleâ¦ air (breath in and out) it goes to the lungs. So if food goes accidentally to your trachea, you choke.