phagocytosis

• phagocytes recognise pathogens from the pathogens foreign antigens on the membrane
• During phagocytosis, phagocytes are attracted to pathogens by chemotaxis, pathogen is recognised by antigens then engulfed by phagocyte and dragged into a phagosome, then lysosomes containing hydrolytic enzymes fuse with phagosome to form a phagolysosome, pathogen is digested by the cell.
• Agglutination sticks bacteria together, making it easier for the phagocyte to engulf many at once
• 2 ways pathogens can cause disease:

  releasing toxins

  killing/damaging healthy body cells or tissues