Blood Vessel Microchip (1 of 2) (IMAGE) Georgia Institute of Technology Caption Researchers at Georgia Tech and Emory University fabricated model blood vessel systems that include artificial blood vessels with diameters as narrow as the smallest capillaries in the body. The systems were used to study the activity of white blood cells as they were affected by drugs that tend to make them softer, which facilitates their entry into blood circulation. Credit Credit: Rob Felt, Georgia Tech Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.