Body Defenses

Body Defenses

MICRO-ORGANISMS = CAUSE DISEASES = PATHOGENS
1. EITHER...
  1. PRODUCE TOXINS
  2. DAMAGE CELLS
  3. BACTERIA
  4. VIRUSES
IGNATZ SEMMELWEISS DISCOVERED CLEANING HANDS REDUCED BACTERIA
1. ANTISEPTICS USED TO KILL PATHOGENS
INFECTIONS PASSED FROM ONE ANOTHER
1. SNEEZING/COUGHING
2. FOOD / DRINK
3. BREAKS IN SKIN
BODY
1. SKIN > BARRIER
  1. PREVENT PATHOGENS ENTERING
2. LUNGS > MUSCOUS
  1. TRAPS MICRO-ORGANISMS
3. HAIRS > SWEEP
  1. REMOVED FROM BODY > COUGH / SNEEZE / VOMIT
  2. STOMACH > ACID
    1. ACID DESTROYS
ARMY INSIDE
1. WHITE BLOOD CELLS
  1. INGEST
    1. TAKE IN AND STOP REPRODUCTION
  2. PRODUCE ANTI-BODIES
    1. SPECIAL CHEMICAL > SPECIFIC TO EACH PATHOGEN
    2. IF SAME PATHOGEN ATTACKS, ANTI-BODIES PRODUCE RAPIDLY
  3. PRODUCE ANTI-TOXINS
    1. NEUTRALISE PATHOGEN
CUTS > PATHOGENS MAY ENTER
1. BLOOD = PLASMA
  1. PLATELETS
    1. CLOT > SCAB = PREVENTS
  2. WBC
  3. RBC

Resource summary

	Created by elliejayne over 10 years ago