In mouth breathers, the position of the tongue tends to be lower than in individuals who primarily breathe through their nose. This adjustment allows for a more unobstructed passage of air into the upper airway. Specifically, the tongue's lowered position affects the dimensions of both the retropalatal and retroglossal parts of the upper airway. The retropalatal region refers to the space behind the palate, while the retroglossal region is situated behind the tongue. When the tongue descends, it creates additional room in both of these areas. This enlargement of the upper airway dimensions can be particularly beneficial for individuals who are mouth breathers, as it helps to facilitate a smoother and more efficient flow of air into the respiratory system. Understanding the impact of tongue position on upper airway dimensions is crucial in assessing and addressing respiratory conditions, especially in cases where mouth breathing is prevalent.