By Stephen Badylak
Badylak seemed to be saying that he could replace human tissue with tissue from another species without triggering a virulent immune response-something that medical scientists considered impossible. Even harder to swallow was the claim that the material could transform, in a matter of months, into whatever type of body tissue had been damaged-muscle, skin, or blood vessel.
The Extracellular Matrix (ECM) is a complex mixture of nonliving material that surrounds the cells, providing structural and biochemical support to every system in the body. The structural support differs depending on the type of cells it supports; thus the structural support for the brain is different than for the skeletal system