New Blood Vessel Network (image) Johns Hopkins Medicine Share Print E-Mail Caption Shown are lab-grown human blood vessel networks (red) incorporating into and around mouse networks (green). Credit PNAS Usage Restrictions Contact PNAS for usage permission. Share Print E-Mail 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.