key words

• pathogen 


  any microorganism that causes disease
• phagosome 


  a vesicle formed when a bacterium is engulfed by a phagocyte
• phagocyte 


  a white blood cell that carries out a non-specific immune response
• phagocytosis 


  process where cells engulf particles to form a vesicle
• plasmid 


  small circular DNA found in bacteria cells
• lysosome 


  contains enzyme called lysozyme which is released in the phagosome
• lymphocytes 


  white blood cell responsible for the immune response
• immunity 


  how the body protects itself from infection
• capsid 


  protein coat that encloses a nucleic acid in a virus