@bacteriaboy9: A white blood cell is a type of cell in the immune system that helps defend the body against harmful pathogens such as bacteria, viruses, and other foreign substances. In the video, one important type of white blood cell, a macrophage, is protecting the body by performing a process called phagocytosis, or “cell eating.” During this process, the macrophage first recognizes and attaches to a pathogen. It then extends parts of its membrane called pseudopodia to surround and engulf the microbe, trapping it inside a membrane-bound structure called a phagosome. The phagosome then fuses with a lysosome, which contains digestive enzymes that break down and destroy the pathogen. ✅ Follow BacteriaBoy for more videos like this #biology #Science #immunesystem #bacteria #edit

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Sunday 08 March 2026 23:16:54 GMT