Saturday, May 7, 2011

Immune System

Moderate regular exercise may enhance our immune system killing bacteria and viruses more rapidly through better circulation.
Intense exercise may suppress immune system as our body produces cortisol and adrenaline (Stress) hormone which raise our blood pressure and cholesterol level.

Exercise help to strengthen our immune system by:-
1) Flushing bacteria out from the lungs which carries airborne illness and carcinogens (Cancer - causing cells). Increase waste output, urine and sweat.
2) Increase rate of sending antibodies or white blood cells (Our body’s defence cells) to detect illness earlier that trigger the release of hormone and warning of intruders.
3) Temporary elevation of temperature may inhibit bacterial growth.
4) Slows down the release of stress related hormones.
5) Increase the natural killer cells, one of the first lines of defence against viruses.

Our immune systems consist of the following:-
Skin and mucous membranes; Tonsils and adenoids; Thymus; Spleen; Lymph nodes; Appendix; Small area of small intestine and bone marrow.

The functions of the white cells are:-
1) T lymphocytes (T stands for thymus-derived) – switching on our immune cells to fight against when there is intruders and switching off when no intruders.
2) B cells – so called the phagocyte (Well known as Macrophage). Eats all sorts of debris in tissue and in the bloodstream and dispose them. They alert certain T cells to the presence of antigens.
3) Killer, suppressor and helper T cells can mutate into cancer cells.
4) Natural killer cells – searching for the cancer cells and destroy them.

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