The tongue, situated in the floor of the mouth, is attached by the lingual frenulum
The lingual frenulum is a thin fold of mucous membranethat holds the body of the tongue to the oral floor.
The lingual frenulum
FrenulumThis is called the frenulum linguae.
A girl who used to be in my school had a medical case where her tongue was more or less attached to the floor of her mouth. The membrane was either too short or too rigid. But the doctors made her have it surgically removed because she couldn't speak clearly otherwise. I guess it allows your tongue to move around your mouth properly.
Tongue tied (or ankyloglossia) is an oral anomaly in which the underside of the tongue is connected to the floor of the mouth by a mucus membrane. Other than decreasing the tongue's mobility, this is not a harmful condition at all. It can be easily repaired by a doctor who fixes it by basically just snipping the mucous membrane so the tongue is no longer tethered to the mouth.
To the floor of the mouth
The Frenulum Linguea
The frenulum is the skin that attaches the tongue to the floor of the mouth.
The tongue is a fleshy muscle on the floor of the mouth of most vertebrates, which is the primary organ of taste.