Natural barriers
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6 Terms
How does skin reduce infection risk?
tough external barrier against pathogen
Vitamin C maintains collagen in connective tissue = strengths tissue = protection
How does skin flora reduce infection risk?
contains bacteria + fungi that out compete pathogenic bacteria
not easily removed by washing
How does blood clotting + inflammation reduce infection risk?
clotting seals wounds to prevent
inflammation increases blood flow to site to heal broken capillaries + raise temp for microbes
How does Phagocytosis reduce infection risk?
phagocytic cells engulf + digest microbes that enter blood
How does mucus and cilia reduce infection risk?
ciliated mucous membranes traps microbes in air to bring to oesophagus where they are swallowed =
How does lysozyme reduce infection risk?
present in tears, saliva, stomach acid to kill bacteria by hydrolysing peptidoglycan molecules
