the abilities of various cells to attach to endothelial monolayers and cause morphologic changes , such as rupture of endothelial-endothelial cell interactions leading to retraction of endothelial cells and exposure of extracellular matrix , as well as their propensities to invade and underlap retracted endothelial monolayers and continue migration were assessed by time-lapse and phase-contrast microscopy as well as scanning and transmission electron microscopy .
C0225336
endothelial
C0014257
endothelial