How did the term "tails" become used during a cointoss?

Question

i understand how heads came to be, but what about tails

Answer 1

Very Simple, you understand why they use heads (the head of a president).  The tail is the opposite of a head.  They were probably thinking about snakes. (one end head - other end tails)  

Answer 2

Prob. b/c heads and tails are opposite...like a head on a dog is on the opposite side of the dog than the tail is.  And since one side of a coin has a president's head on it, and the other side is opposite, they used the opposite word.

Answer 3

the tail of the american eagle on the quarter  

Answer 4

Because of two ends of an animal (head to tail)

Answer 5

because heads is the top of something and the tail is the bottom