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8625135
Preventing and Fighting Disease
Descripción
GCSE Biology Mapa Mental sobre Preventing and Fighting Disease, creado por Antonia Rout el 22/04/2017.
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biology
gcse
Mapa Mental por
Antonia Rout
, actualizado hace más de 1 año
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Creado por
Antonia Rout
hace más de 7 años
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Resumen del Recurso
Preventing and Fighting Disease
Natural Defence System
Skin
Acts as barrier for pathogens and secretes antimicrobal substances
Hairs and mucus in the nose
Hair traps pathogen that have been breathed in, in mucus in the nostrils
Trachea and Bronchi
Secrete mucus to trap pathogens
Lined with cilia (hair like projections).
Waft mucus up to the back of the throat where it can be swallowed
Stomach
Produces hydrchloric acid which kills pathogens that make it far from the mouth
Preventing the Spread of Disease
Being hygeinic
E.g. washing hands before preparing food or after sneezing
Destroying vectors
Vectors that are insects can be killed using insecticides or by destroying their habitat so they can no longer breed.
Isolating Infected Individuals
Vaccination
People who have been vaccinated cannot develop the infection and then pass it on to someone else.
Immune System/White Blood Cells
Consuming/engulfing pathogens
Called PHAGOCYTOSIS
Producing Antibodies
Every pathogen has unique antigens on its surface.
White blood cells produce antibodies to lock onto this specific antigen.
Antibodies are then produced rapidly and carried around the body to find all similar bacteria or viruses.
If the same pathogen enters the body again, the white blood cells will rapidly produce the correct antibodies to kill it.
Producing antitoxins
Antitoxins counteract the toxins produced by invading the bacteria
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