What is meant by "the resurrection of the body"? By "the resurrection of the body" is meant that at the end of the world the bodies of all men will rise from the earth and be united again to their souls, nevermore to be separated.
Behold, I tell you a mystery. We shall all indeed rise again. (I Corinthians 15:51)
Why will the bodies of the just rise? The bodies of the just will rise to share forever in the glory of their souls.
Has the body of any human person ever been raised from the dead and taken into heaven? By the special privilege of her Assumption, the body of the Blessed Virgin Mary, united to her immaculate soul, was glorified and taken into heaven.
Further reading: CCC 988-1001