Why are tongues wet?

The tongue is kept moist by saliva, a fluid that is produced by the salivary glands. Saliva contains water, electrolytes, and proteins, which help to keep the mouth and tongue moist and lubricated. Saliva also helps to break down food and to protect the teeth from decay.

The tongue is also moistened by the mucus that is produced by the mucous membranes of the mouth. Mucus is a thick, sticky fluid that helps to protect the mouth from infection and irritation.

The tongue is also moistened by the blood that flows through the lingual arteries and veins. The lingual arteries supply the tongue with oxygen-rich blood, while the lingual veins drain deoxygenated blood from the tongue.

The combination of saliva, mucus, and blood helps to keep the tongue wet and lubricated. This is important for speaking, eating, and drinking.