Artificial organs.

Artificial organs are complex systems of natural or manufactured materials used to supplement failing organs while they recover, sustain failing organs until transplantation, or replace failing organs that cannot recover. Some whole organs have artificial counterparts: heart, kidneys, liver, lungs, and pancreas. Smaller body parts also have artificial counterparts: blood, bones, heart valves, joints, skin, and teeth. In addition, there are mechanical support systems for circulation, hearing, and breathing. Artificial organs are composed of biomaterials, biological or synthetic materials that are adapted for use in medical applications.