II. Respect for the Dignity of Persons

From The Catechism of the Catholic Church

2296
Organ
transplants are in conformity with the moral law if the physical and
psychological dangers and risks incurred by the donor are proportionate to the
good sought for the recipient. Donation of organs after death is a noble and
meritorious act and is to be encouraged as a manifestation of generous
solidarity. It is not morally acceptable if the donor or those who legitimately
speak for him have not given their explicit consent.
It is furthermore morally inadmissible directly to bring about the disabling
mutilation or death of a human being, even in order to delay the death of other
persons.

PART THREE: LIFE IN CHRIST

SECTION TWO THE TEN COMMANDMENTS
- CHAPTER TWO YOU SHALL LOVE YOUR NEIGHBOR AS YOURSELF
  - Article 5 THE FIFTH COMMANDMENT
    - II. Respect for the Dignity of Persons

From The Catechism of the Catholic Church – rosary.team