Food energy is potential energy that animals (including humans) derive from their food through the process of cellular respiration.
The three kinds of treatment used for tongue cancer are: 1  Surgery: removal of the cancerous tumor and surrounding tissue. 2  Radiotherapy: uses high-energy particles from radioactive elements to kill cancerous cells left behind after surgery.
â¢ Oral cancer: Black spots on the underside and/or the surface of tongue can also be a sign of oral cancer. It is however rare as most cases of oral cancer are accompanied by white spots on tongue. Oral cancer is marked by formation of malignant tissues in the oral cavity.