<unk>  may both refer to<unk>  and<unk>  that are relatively often or routinely transplanted (here "main<unk>  and<unk> "), as well as relatively seldom transplanted<unk>  and<unk>  and ones on the experimental stage.
Transplantable organs and tissues
Artificial organ
Blood substitute
Single-use medical devices
Liver support system
Organ donation in Jewish law
Custom-made medical device
Blood pool agent