Final answer:
Opsonins on damaged cells facilitate the attachment of phagocytic cells. They coat pathogens to assist in phagocyte binding and promote phagocytosis.
Step-by-step explanation:
The attachment of phagocytic cells to damaged/infected cells is facilitated by the presence of opsonin on the damaged cell. Opsonins, such as complement factors, C-reactive protein, and serum amyloid A, coat the pathogen to assist in phagocyte binding and facilitate phagocytosis. IgG antibodies also serve as excellent opsonins, binding to specific epitopes on the surface of pathogens and helping phagocytes attach to and engulf the pathogens.