What are these bumps on the back of my tounge?

Bumps in tongue. Sorry but that has to be seen by a dr. I would sugest you to see an ENT (ear, nose, throat specialist. If you are a smoker there are changes for tumors or cancer in the tongue or mouth. Other possibilities are simple glossitis or inflammation, yeast, other fungal infections, abscesses.
Normal anatomy. Don't worry. Everybody grows them.

Related Questions

I was just wondering what the bumps on the back of my tounge are? When I swallow I feel like a weird sensation on the back of my thought.

Papillae. They are called circumvallate papillae. Follow the below link for more info: http://en. Wikipedia. Org/wiki/vallate_papilla.
Taste buds? They are most likely taste buds and normal, but you will have to have your own dentist take a look just to make sure it is nothing else.