A Lung's Inner Reaches (video) University of Iowa Loading video... Caption The video shows the imaging of a section of a mouse lung. As the image rotates, more respiratory branches (bronchioles) are shown, along with three acini (yellow, green and orange clusters). The blood vessels feeding the acini are then added with the arteries shown in blue and the veins in red. Credit University of Iowa Usage Restrictions None 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.