biology

Biology:

Keeping Healthy:

Bacteria and viruses-

• Microorganisms that cause infectious diseases are called Pathogens.
• Bacteria and viruses are the two main types of pathogen that may affect health.

Bacteria:

• Very small
• Reproduce very quickly
• Can produce toxins (poisons) that can make us feel ill.
• Responsible for illnesses like tetanus, cholera, tuberculosis. 

Viruses:

• Even smaller than bacteria
• Reproduce very quickly once inside living cells, which are then damaged.
• Can produce toxins (poisons) that can make…