text: Biomaterials can be constructed using only materials sourced from plants and animals in order to alter, replace, or repair human tissue/organs. Use of natural biomaterials were used as early as ancient Egypt, where indigenous people used animal skin as sutures. A more modern example is a hip replacement using ivory material which was first recorded in Germany 1891.
  Valuable criteria for viable natural biomaterials:
  * Biodegradable
  * Biocompatible
  * Able to promote cell attachment and growth
  * Non-toxic
  Examples of natural biomaterials:
  * Alginate
  * Matrigel
  * Fibrin
  * Collagen
  * Myocardial tissue engineering