Transubstantiation Vs. Consubstantiation Vs. Impanation?

[LittleWaySoul]

I'm really confused about the differences between these three. I know the Catholic church considers consubstantiation and impanation to be heretical (right?), but I've tried reading about them and they seem very very similar to the idea of transubstantiation. Can anyone explain the difference to me in relatively simple terms?Thank you so much! God Bless!

Edited September 7, 2012 by LittleWaySoul

[Theoketos]

They are all very simmilar. There is a specific and essential difference between the first two and the third.

I am really not sure there is not a difference between:

Impanation: The medieval and Reformation doctrine that the body of Christ is present within the Eucharistic bread and does not replace it.

Consubstantiation: The doctrine, esp. in Lutheran belief, that the substance of the bread and wine coexists with the body and blood of Christ in the Eucharist.

But

Transubstantiation supposes that the essence, nature, or what the bread is ceases to be. In its place is the essence, nature, or what-ness of Christ.