👉 Trachles is a term used in medical terminology to describe a collection of small, liquid-filled sacs that form between the walls of the esophagus and the stomach. These sacs are known as tracheoesophageal fistulaes (TEFs), which can occur due to various causes such as infection, trauma, or malnutrition. The trachles contain fluid, blood, and sometimes other substances like bile or mucus. They help in maintaining the balance of fluids between the