Final answer:
Phagocytes reach the area of injury/infection through extravasation, which involves the migration of white blood cells from the bloodstream into the infected tissue. They then engulf and digest pathogens through phagocytosis.
Step-by-step explanation:
The phagocytes, such as neutrophils and macrophages, reach the area of injury or infection through a process called extravasation. This process involves the migration of white blood cells from the bloodstream into the infected tissue. Once in the tissue, the phagocytes engulf and digest pathogens through phagocytosis.