E.g. Organoids, An artificially grown mass of cells or tissue that resembles an organ.

Tissue engineering is the use of a combination of cells, engineering and materials methods, and suitable biochemical and physicochemical factors to improve or replace biological tissues. 

The first "fully-functioning" lab-grown organ was touted in 2014 with the creation of a mouse thymus.

Community content is available under CC-BY-SA unless otherwise noted.