制造新型人体器官
The human body works like a machine. Over time, its parts wear out or get damaged. For example, disease may weaken the heart or a bone may break. When the body cannot heal itself, a doctor may repair or replace diseased or broken parts to keep the body running smoothly. Sometimes, a living or dead human donor provides a part. Donations of hearts, lungs, kidneys, bone marrow, blood, and other tissues regularly save lives. But getting new parts from other human beings isn’t the only way to accomplish this.
