MICROANATOMY

Detailed explanation-1: -The process where these white blood cells surround, engulf, and destroy foreign substances is called phagocytosis, and the cells are collectively referred to as phagocytes. Phagocytes eventually die. Pus is formed from a collection of dead tissue, dead bacteria, and live and dead phagocytes.

Detailed explanation-2: -Another function of phagocytosis in the immune system is to ingest and destroy pathogens (like viruses and bacteria) and infected cells.

Detailed explanation-3: -Phagocytosis is an evolutionarily conserved mechanism by which certain cells engulf and digest other cells or foreign particles.

Detailed explanation-4: -Once cell death has occurred in a living organism, dead cell corpses are immediately detected and cleared by phagocytes such as macrophages and dendritic cells, rather than left in the body (15).

Detailed explanation-5: -Phagocytosis is an evolutionarily ancient, receptor-driven process, by which phagocytic cells recognize invading microbes and destroy them after internalization. The phagocytosis receptor Eater is expressed exclusively on Drosophila phagocytes and is required for the survival of bacterial infections.