communicable diseases Flashcards
1
Q
whats a communicable disease
A
illness spread by direct contact:
contact with blood, bodily fluids, breathing airborne virus and being bitten by insect
2
Q
human defense systems
A
skin covering whole body, protecting against physical damage
nasal hairs keep out dust
mucus traps dust and microbes
stomach contains hydrochoric acid and distroys microorgansims
white blood cells ingest pathogens . produces antibodies and antitoxins
