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It's actually part of two organ systems. Digestive and Muscular. Source: My Anatomy and Physiology textbook. The tongue is part of the digestive system.
Life will become miserable without tongue. Therefore we should take great care of this organ which is made up of muscles. Function of the tongue. 1  On the surface of the tongue there are tiny papillae, they are in large number and the main function of the papilla is they act as taste buds. 2  Tongue can distinguish the taste of the food, such as bitter, sour, sweet and salty. 3  Tongue is responsible for speech.