GET A BACKBONE. STAND FOR SOMETHING!

I learned from my biology class that living organisms are classified according to the following:
A. Vertebrates - living organisms that have a backbone
B. Invertebrates - living organisms that do not have a backbone

And I also learned from life the following:

All human beings are vertebrates. TRUE.
But not all human beings have a back bone.

GET A BACKBONE. STAND FOR SOMETHING!