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117005
Primary lines of Defence
Description
0 Biology Mind Map on Primary lines of Defence, created by Lily Page on 31/05/2013.
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biology
biology
0
Mind Map by
Lily Page
, updated more than 1 year ago
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Created by
Lily Page
about 11 years ago
106
1
0
Resource summary
Primary lines of Defence
Skin
Impermeable to most pathogens
Some can penetrate
Viruses that create warts
'Flora' of harmless bacteria
Live on healthy skin
Most pathogenic bacteria cannot survive in skin
Lactic + fatty acids secreted by sweat glands
pH is too low for them
Damaged skin is an entrance for harmful bacteria
Underlying tissue
Blood clotting seals wounds quickly
Vagina
Bacterium keep pH low by secreting lactic acid
These bacteria can be killed by using antibiotics
pH of vagina rises, allowing other microorganisms to multiply more
Eyes + Mouth
Bathed in fluids which have bactericidal action
Lysozyme
Saliva + Tears
Enzyme that destroys/damages many bacteria
Semen
Spermine
Breast milk
Lactoperoxidase
Stomach
Hydrochloric acid
Destroys/damages bacteria ingested in food
Mucus
Protects digestive and respiratory tracts from infection
Barrier
Bacteria cannot make contact with epithelial cells lining walls of tubes
Traps bacteria and other particles
Produced by goblet cells
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