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:
For example: 1  If a person has all of their teeth except for their wisdom teeth, their teeth will be numbered 2 thru 15 and 18 thru 31. 2  If a person has had their lower right first molar extracted (tooth #30), the teeth on either side of this tooth space will still keep the numbers 29 and 31.