Microbiology: is a great complex of biological sciences about microorganisms, it studies organisms too small to be seen without magnification.
• Micro - too small to be seen with the naked eye
• Bio - life
• logy - study of
 Microorganisms are ubiquitous, include:
 bacteria
 viruses
 fungi
 Parasite {protozoa & helminthes (worms)}
 algae