Natural immunity is generated in the body of an
organism without exposure to external influences or microbes. Where that
natural immunity does not distinguish between live components (viruses -
bacteria - fungi) and between the others components (chemical compounds).
A. Skin:
Skin contains many glands, fatty and ethnic,
secrete special chemicals, to protect the body from certain objects, or their
toxins. And the presence of the skin,
and its safety, prevent these objects from
accessing into the blood, so at a scratched or injured skin, microbes can access directly into the blood through the
skin and injury the body by diseases. Based on this, the disinfecting wounds
and scratches, is essential in protecting the body from diseases.
B. Cilia and the mucous membrane lining for the
nose and respiratory tract:
These mucous membranes warms the air before entering the respiratory tract, and prevent
the foreign substances which found in the air, by sticking with mucus. As it
expels cilia continuous movement in the direction of the outside, dust grains,
and foreign substances outside the respiratory tract.
C. Tears:
Tears contain protein enzymes which analyze
microbes, and kill them, and wash the eye from dust particles, or foreign
objects. And that noted in the case of a foreign body entered to the eye, such
as hair or otherwise, and the heavy tears, which follow that.
D. Degree of Acidity:
the relative increase of the acidity in some
body secretions, leads to eliminate bacteria. And that such acidity of the
digestive system, which destroys the bacteria in polluted foods and drinks. As
well as it leads to the elimination of microbes, which may exist in the
urethra, as well as Urine acidity, the acidity of urine if acidic vaginal
secretions in women.
E. Blood cells:
The blood cells protect the human body
internally, like phagocyte cells that attack the microbe, and forwarded it to other specialized cells,
such as T and B cells and others.
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