John Mann - The substance of the bread and wine are transformed. But the physical aspects (accidents) are the same.
Yes I was brought up as a Catholic as well, and was taught something similar. In simple terms, the bread and wine is said to have been transformed, but the transformation is undetectable. Using fancy words such as "transubstantiation" makes it sound sound more profound and gives the concept an air of credibility.
Question for John Mann: what is a difference between a "transformation" that is not physically observable, and a transformation that is said to only occur symbolically?