Building Flesh and Blood; Understanding how networks of blood vessels form is key to engineering transplantable organs and tissues. May 01, 2014 Thousands of unfortunate patients are badly in need of a replacement organ. As of April 2014, more than 122,000 such people in the United States were on the waiting list maintained by the national... Read More Building Flesh and Blood; Understanding how networks of blood vessels form is key to engineering transplantable organs and tissues.