Oats are more tolerant to extreme conditions than some of their grassy relatives, like wheat, and it is probable that they began to be cultivated in Europe for that reason. This grain continues to be farmed all over the world in areas that are not suited to more finicky grains.
Dental chart (tooth numbering) Teeth are numbered in order to identify them with ease. However there are two common systems of numbering teeth that can confuse unless you know which one you are using. America uses the Universal numbering system and numbers teeth like this:
PERMANENT TEETH or wisdom teeth,formation begins at the age of 6yrs and completed by 12yrs. The number of teeth of each type is written as a dental formula for one side of the mouth, with the upper and lower teeth shown on separate rows. Human dental formula: Upper teeth - 2 .1.