It may surprise some people that the Catholic Church is strongly in favour of organ and tissue donation. When done in an ethically acceptable manner, the gift of an organ or tissues to another person is in keeping with the church’s teaching on respect for the life and dignity of the human person, including our belief in the resurrection of the body. Donating part of our physical body after death does not compromise what is eternal any more than cremation or the natural decaying of the body in the ground would.
In his encyclical Evangelium vitae, Blessed John Paul II reminds us that The Gospel of Life is celebrated above all else in the life filled with self giving for others. He tells us that a particular praiseworthy example of such gestures is the donation of organs with a view to offering a chance of health and even life to the sick for whom there is sometimes no other hope.