Catechism Part 1, Section 2, Chapter 3, Article 11: The Resurrection of the Body (988-1019)

The Creed culminates with the resurrection of the dead. As Christ rose from the dead, so shall we on the last day; not only our soul, but our body as well. This has been essential to the Christian faith from the beginning of the Church.The resurrection of the body occurs on the last day and life everlasting occurs after this. The resurrection is done by the Holy Spirit. The righteous live with Christ after they have dies. TThe mortal body comes back to life and the soul goes to heaven.

I. Christ's Resurrection and Ours (992-1004)
God progressively revealed the resurrection of the dead to his people. (and) Jesus calls himself "the Resurrection and the life." We shall rise like Christ with him and through him.  Being a witness of Christ is to be a witness to his resurrection. The Resurrection of the Body is met with much opposition.
When we die, our soul is separated from our body, which decays. Through Christ's resurrection, our souls will be reunited with our bodies. All will rise, some to life and others to judgment. It will not be in an earthly body, but a spiritual body. This exceeds our understanding and we can only understand through faith. It will happen on the last day.
In a way, we have already risen with Christ through participation in his death and resurrection through baptism, as we belong to the Body of Christ. In anticipation of the last day when we will appear with Christ in glory, we believe that we must treat our own bodies and all others' with dignity and respect especially those who suffer. Also the faith in the resurrection is based on faith in God who is God of the living not the dead. 

II. Dying in Christ Jesus (1005-1014)
If we are to rise with Christ, we must first die with Christ. Bodily death is natural and we remember that our time on Earth is limited. Death is a consequence of sin. Death  (but it ) has been transformed into a blessing through Christ by his suffering on the cross until death for us.
Because of Christ's death, death has a whole new positive meaning to Christians, as we have sacramentally died with Christ through baptism. God calls us to him through death. It is the end of our earthly pilgrimage, and we shall not return to our earthly lives. The Church encourages believers to prepare for death by asking Mary the mother of God to pray for us at the hour of our death as prayed in the Hail Mary and to trust ourselves to St. Joseph the patron saint of happy death.