ANATOMY

Detailed explanation-1: -The process begins when chemicals from a pathogen, or damaged tissue, attract a phagocyte. The phagocyte binds to the microbe, envelopes it, and then eats it. Enzymes within the phagocyte kill and digest the pathogen. This action is called phagocytosis.

Detailed explanation-2: -Phagocytes degrade pathogens through phagocytosis, which involves engulfing the pathogen, killing and digesting it within a phagolysosome, and then excreting undigested matter.

Detailed explanation-3: -Phagocytes contain membranous sacs called lysosomes that contain various digestive enzymes, microbicidal chemicals, and toxic oxygen radicals. The lysosomes fuse with the phagosomes containing the ingested microbes and the microbes are destroyed.

Detailed explanation-4: -White blood cells, also called leukocytes (LOO-kuh-sytes), play an important role in the immune system. Some types of white blood cells, called phagocytes (FAH-guh-sytes), chew up invading organisms. Others, called lymphocytes (LIM-fuh-sytes), help the body remember the invaders and destroy them.

Detailed explanation-5: -Phagocytes (neutrophils and monocytes) are immune cells that play a critical role in both the early and late stages of immune responses. Their main role is to circulate and migrate through tissues to ingest and destroy both microbes and cellular debris.