Thomas Aquinas, Compendium of Theology

Since the soul is united to the body as its form, and since each form has the right matter corresponding to it, the body to which the soul will be reunited must be of the same nature and species as was the body laid down by the soul at death. At the resurrection the soul will not resume a celestial or ethereal body, or the body of some animal, as certain people fancifully prattle. No, it will resume a human body made up of flesh and bones, and equipped with the same organs it now possesses.

Furthermore, just as the same specific form ought to have the same specific matter, so the same numerical form ought to have the same numerical matter. The soul of an ox cannot be the soul of a horse's body, nor can the soul of this ox be the soul of any other ox. Therefore, since the rational soul that survives remains numerically the same, at the resurrection it must be reunited to numerically the same body.