IMMUNITY
1
Three line defence mechanism of the health to combat pathogen:
The immune system works as a network of cells and tissues for protecting the body.
Attacking viruses and bacteria try to invade the body where immune system targeted them while
leaving healthy tissue alone. In this context, the body uses three lines of defences against
pathogenic infection. The first line of defence against infection is skin, mucous membrane and
physical barriers which can prevent the entry of the pathogen (Engelkirk, Duben-Engelkirk &
Burton, 2011). The second line of defence is nonspecific phagocytes and other internal
mechanisms that comprises innate immunity. The third line of defences that can produce
antibodies as a part of adaptive immunity.
The first line of defence:
It is the chief defence against infections and these surfaces include skin where dryness,
acidity and temperature inhibit the growth of the pathogen (Engelkirk, Duben-Engelkirk &
Burton, 2011).. Both skin and mucous membrane release chemicals that can restrict the
multiplication of microbes. A prominent example is acidity and temperature of skin that can
prevent entry.
The second line of defence:
The second line of defence is against impurity are nonspecific cellular as well as a
molecular response which do not differentiate pathogens types and response in similar ways.
One of the prominent examples is phagocytic leucocytes that migrate to the infection site and
engulf the foreign bodies or antigen that were detected (Cardamone et al., 2016). This response
can induce swelling amongst individuals.

Defense Mechanism of the Health to Combat Pathogen

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