C02

Carbon dioxide is a chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom. It is a gas at standard temperature and pressure and exists in Earth's atmosphere in this state. It is currently at a globally averaged concentration of approximately 375 ppm by volume in the Earth's atmosphere, although this varies both by location and time. Carbon dioxide's chemical formula is .
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Malignant neoplasm of other and unspecified parts of tongue
  

Dorsal surface of tongue
  

Border of tongue
  

Ventral surface of tongue
  

Anterior two-thirds of tongue, part unspecified
  

Lingual tonsil
  

Overlapping lesion of tongue
  

Tongue, unspecified