It is important to inspect tina's mouth thoroughly because oral cancers are most commonly found:

The most common type of cancer in the oral cavity is squamous cell carcinoma and the most common area of the oral cavity that is affected by cancers are the lips and tongue. A systematic physical examination of the oral cavity must be done to differentiate a benign lesion to a potentially malignant ones.

Non living: objects like rocks, buildings, and snow.living: animals, plants and humans.