WYSS INSTITUTE FOR BIOLOGICALLY INSPIRED ENGINEERING AT HARVARD IMAGE: THIS IMAGE SHOWS HOW NEUTROPHILS (FLUORESCING IN GREEN) THAT WERE ADDED TO THE BLOOD CHANNEL HAVE ATTACHED THEMSELVES TO THE ENDOTHELIUM (WITH CELLS OUTLINED WITH A MARKER SHOWN IN MAGENTA) AND TRANSMIGRATE TO THE EPITHELIUM IN THE PARALLEL CHANNEL. CREDIT: WYSS INSTITUTE AT HARVARD UNIVERSITY Cystic...