Do some white blood cells surround ans swallow whole germs?

Yes, some white blood cells called macrophages have the ability to surround and engulf foreign particles, including bacteria, dead cells, and other microscopic debris, through a process known as phagocytosis. Macrophages extend their plasma membrane to envelop the foreign material, forming a phagocytic cup that eventually encloses the substance into a membrane-bound compartment called a phagosome. The phagosome then fuses with lysosomes, which contain digestive enzymes and antimicrobial substances, to form a phagolysosome. Within the phagolysosome, the ingested material is degraded and destroyed. Through this process, macrophages play a vital role in removing pathogens, cellular debris, and other harmful substances from the body, contributing to overall immune defense and tissue homeostasis.