The tongue is arguably the third most important muscle in the human body after the heart (responsible for circulation), the diaphragm (for breathing, and many other functions such as lymph flow of lymph)
There are 8 muscles within the tongue that connect it to important respiratory related muscles in the pharyngeal (airway) wall, floor of the mouth wall as well as the hyoid bone. Of the 12 cranial nerves, five are involved in innervating to the tongue.
To have almost half of the cranial nerves supplying the tongue is a good indicator of how important the brain regards the tongue. It also shows that if the tongue is crowded (due to small jaws and crowded teeth), it’s a great way to upset the central nervous system.
The tongue’s resting posture and muscle tone is incredibly important. If the tongue does not have the correct resting posture and muscle behaviour, it results in serious dysfunctions. The results can be debilitating for human health.
I hope from this you can understand the importance of the tongue for functional dental, airway and whole body health.