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a muscular structure on the floor of the mouth of most vertebrates, which manipulates food for mastication by mixing the food with the saliva. It is the primary organ of taste and, in humans, a secondary function is to assist in the production of certain sounds.
a system of veins which carries blood from the digestive tract to the liver.
a duct through which saliva passes from the salivary gland into the mouth.
a clear, colourless solution of hydrogen chloride (HCl) in water. It is a strong and highly...
the movement of respiratory gases across a respiratory surface.