A finger is an arm or leg of the body and also a sort of number, an organ of adjustment and experience discovered in the hands of humans and other primates. [1] [2] Generally people have 5 numbers, the bones which are described phalanges, [2] on each hand, although some people have much more or less than 5 due to hereditary conditions such as polydactyly or oligodactyly, or unintended or medical amputations. The very first number is the thumb, followed...