Researchers at Vanderbilt University have been harnessing cotton candy machines to spin out threads similar in size, density and complexity to the patterns formed by biocapillaries. Already announced that they have succeeded in using this unorthodox technique to produce a 3D artificial capillary system, they are working on fiber networks that can be used as templates to produce the capillary systems required to create full-scale artificial organs.

Source: http://news.vanderbilt.edu/2016/02/cotton-candy-machines-may-hold-key-for-making-artificial-organs/