Inflammation: Leukocyte margination
The first cells to arrive at the wound site are the polymorphonuclear leukocytes (PMNs).They have a limited scavenging role, eating and digesting foreign material through acid hydrolytic enzymes.

This slide shows margination of neutrophils on the endothelial surface of a post-capillary venule, just before diapedesis into the extravascular space.

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Pathology slide courtesy of Jim Fishback M.D., copyright University of Kansas Medical Center School of Medicine