Tissue Engineering can be defined this way (Wikipedia):
Tissue engineering is the use of a combination of cells, engineering and materials methods, and suitable biochemical and physio-chemical factors to improve or replace biological functions. While it was once categorized as a sub-field of bio materials, having grown in scope and importance it can be considered as a field in its own right.
Tissue Engineering and Regenerative Medicine International Society is an international learned society. Its goal is the worldwide advancement of both the science and technology of tissue engineering and regenerative medicine. Thematic groups include: Developmental biology; Scaffolds and matrix biomaterials; Bioprinting; Biofabrication; Bioreactors; Bioprocessing; Inflammation and immunity; Imaging; Cell sourcing and manipulation; Pre-clinical protocols; Clinical trials; and Infrastructure – regulatory, health economics, ethics.
The mouse with the ear on its back.
Time Magazine: An Eary Tale; vol.146, no.19, Nov 6, 1995.
This stuff is quite expensive now (2012), but with time it will become common and used by the general public. Amaze yourself with the following videos: Bioprinting (News), Bioprinting (Future), Lab Grown Lung, Skin Gun, Synthetic Biology.
Plus, some characteristics could be modified to even be more eco-friendly!
Possibilities are unlimited…