Phagocytosis involves leukocytes migrating to infection sites, engulfing pathogens with pseudopodia into phagolysosomes for digestion, and potentially presenting antigens to trigger the adaptive immune system.
Phagocytosis involves circulating leukocytes migrating to infection sites (extravasation) upon chemotaxis signals. Pathogens are ingested via pseudopodia into vesicles, which fuse with lysosomes (phagolysosomes) for digestion. Antigens may then be presented to stimulate the adaptive immune system.
| Original | 1. phagocytic leukocytes circulate in the blood, extravasation in resposne to infection 2. damaged tissues attract white blood cells (chemotaxis) 3. pathogens enhulged when pseudopodia surround the pathogen and fuse -> internal vesicle 4. vesicle fused to lysosomen (phagolysosome), pathogen digested antigens may be present on phagocyte to stimulate 3rd line of defense |
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| Title | process of phagocytosis |
| Settings | 1,1,0 | n,n,n,n |
| Text1 | 1. phagocytic leukocytes circulate in the blood, extravasation in resposne to infection ... ... ... ... |
| Text2 | 1. phagocytic leukocytes circulate in the blood, extravasation in resposne to infection 2. damaged tissues attract white blood cells (chemotaxis) ... ... ... |
| Text3 | ... 2. damaged tissues attract white blood cells (chemotaxis) 3. pathogens enhulged when pseudopodia surround the pathogen and fuse -> internal vesicle ... ... |
| Text4 | ... ... 3. pathogens enhulged when pseudopodia surround the pathogen and fuse -> internal vesicle 4. vesicle fused to lysosomen (phagolysosome), pathogen digested ... |
| Text5 | ... ... ... 4. vesicle fused to lysosomen (phagolysosome), pathogen digested antigens may be present on phagocyte to stimulate 3rd line of defense |
| Full | 1. phagocytic leukocytes circulate in the blood, extravasation in resposne to infection 2. damaged tissues attract white blood cells (chemotaxis) 3. pathogens enhulged when pseudopodia surround the pathogen and fuse -> internal vesicle 4. vesicle fused to lysosomen (phagolysosome), pathogen digested antigens may be present on phagocyte to stimulate 3rd line of defense |
Tags: 6_3_disease_defenses
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