humility

I was reading through machine learning methods when I had a thought, "Wasn't some of these how the body programmed its cells?" Like with the Thymus The Body continouly produce T-Cells then runs them through examples of the various cells in the body and examples of remembered bad cells. If the T-cells attack a good cell or don't attack a bad cell, they are recycled That sounds to me like the same method used for basic machine learning. Is machine learning called something different when done by the body?