sense organ tongue A mobile mass of muscular tissue that is covered with mucous membrane, occupies much of the cavity of the mouth, forms part of its floor, bears the organ of taste, and assists in chewing and swallowing. [TFD][VHOG] A muscular organ in the floor of the mouth. AAO:0010360 BTO:0001385 CALOHA:TS-1050 EFO:0000833 EHDAA2:0002062 EHDAA:9144 EMAPA:17185 EV:0100058 FMA:54640 GAID:816 MA:0000347 MAT:0000040 MESH:D014059 MIAA:0000040 Many species of fish have small folds at the base of their mouths that might informally be called tongues, but they lack a muscular structure like the true tongues found in most tetrapods Most adult amphibians have a tongue, as do all known reptiles, birds and mammals. Thus it is likely that the tongue appeared with the establishment of tetrapods and this structure seems to be related, to some extant, to the terrestrial lifestyle.[well established][VHOG] Muscular organ in the floor of the mouth.[FEED] OpenCyc:Mx4rvVjmJ5wpEbGdrcN5Y29ycA_53KXLq9EdqAAAACs6hnmQ TAO:0005333 The tongue has contributions from all pharyngeal arches which changes with time. The tongue initially begins as swelling rostral to foramen cecum, the median tongue bud.. tongue muscles derive from the somites - http://php.med.unsw.edu.au/embryology/index.php?title=Tongue_Development#Pharyngeal_Arch_Contributions The tongue is the movable, muscular organ on the floor of the mouth of most vertebrates, in many other mammals is the principal organ of taste, aids in the prehension of food, in swallowing, and in modifying the voice as in speech[GO][GO:0043586]. UMLS:C0040408 VHOG:0000419 XAO:0000446 ZFA:0005333 glossus in MA the tongue is part of the oral region, which in uberon is treated as the oral opening. consider revising oral opening - oral region equivalence.