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= Using Image J = Image J is open-source software available to analyze images. The software can be used to display, annotate, calibrate, edit, process, measure and analyze the images. It is a Java-based program first developed at the National Institutes of Health and the Laboratory for Optical and Computational Instrumentation.

Endothelial Cells
Endothelial cells are the cells that line the blood vessels. These cells are in direct contact with the blood.