What do you call a snake with no backbone?

Explanation:

(cause they are so flexible), snakes actually do have bones.  Animals with bones are know as vertebrates -- snakes are vertebrates.

A snake's backbone is made up of many vertebrae attached to ribs.  Humans have approximately 33 vertebrae and 24 ribs.  Snakes have between 200-400 vertebrae with as many ribs attached! That is what makes them so flexible and helps them move along!

All those bones and the strong muscles protect the internal organs.  The throat of the snake takes up the front one-third of the body.  It leads to a really long stomach, which, like the throat, will stretch to the size of whatever the snake is eating.