The human body’s Immune System is a very subtle network of cells, tissues & organs that work together to defend the body against attacks by “foreign invaders”; primarily bacteria, parasites, fungi and viruses. It can recognize, remember, and wipe out all foreign microbes by producing secretions & new cells. In nutshell, it is the defense mechanism responsible for maintaining the resistance power of human body to diseases.

The organs of Immune System, positioned throughout the human body, are known as Lymphoid Organs because they are home to Lymphocytes (small white blood cells; the key players in Immune System). The Lymphocytes are mainly of two types: T Cells and B Cells. B Cells release antibodies into body’s fluids to ambush foreign antigens in the blood stream and the job of attack is left to T Cells. Lymphocytes travel throughout the body using blood vessels and patrol everywhere for foreign invaders. They can also travel through a System of Lymphatic Vessels that closely parallels the body’s veins and arteries. Cells and fluids are exchanged between blood and lymphatic vessels, enabling the lymphatic system to monitor the entire body for invading microbes.

The Immune System’s arsenal includes not only lymphocytes cells but also phagocytes and others cells. The immune cells begin as immature stem cells in bone marrow and then grow into specific immune cell types, such as T Cells, B Cells and phagocytes and their relatives. Some immune cells take on all intruders whereas others take on highly specific targets.

                   Carelessness, Improper diet, inactive lifestyle and lack of exercise,   disorderly eating and sleep habits, living under constant stress and tension, living in unhygienic and polluted conditions are some of the major factors which weaken the immune system.    The Antibiotics, Steroids and Vaccinations also directly affect and weaken the Immune System. To know more about Immune System, go to  following websites  :-

http://www.becomehealthynow.com/ebookprint.php?id=786

http://www3.niaid.nih.gov/topics/immuneSystem/frontiers.htm

Taking into account the subtlety, complexity and importance of Immune System, maintaining the balance and vitality of Immune system is very important. As conventional medicines including vaccination, are suppressive with serious side-effects, one must follow Natural Healing only as far as Immune System is concerned.

Natural Healing is healing by natural products. It is a drugless approach. It is the use of water, air, heat, coolness, vegetables, fruits, herbs, exercise etc. to keep the body in good health as per requirements of human body in different seasons and climates. Natural Healing starts:- when one starts paying attention to one’s body- both physical and mental; when one starts connecting with Nature-both visible and invisible; when one starts realizing the existence of natural products both within and outside the body. So, the Natural Healing is self-enlightenment and becoming independent in health matters.

It is this quest for becoming independent in health matters which has developed some proven methods of Natural Healing such as Herbal Remedies, Yoga & Pranayama, Breathing Exercises, Naturopathy, Acupressure & Acupuncture, Reflexology, Aerobic and Jogging Exercises, Ayurveda and Unani System of medicines, Homeopathy, Morning Walk and Laughter Clapping etc.

Out of above, Yoga and Pranayama is recommended. Out of Yoga also, it is Pranayama (Breathing Exercises) recommended for maintaining the health and rejuvenation of immune system.

“Pran” is a Hindi word, means “breath” and “a+yama” also a Hindi word, means “exercise, practice, method”. So, Pranayama means Breathing Exercises. To know more on Pranayama, read my other  hubs here in HubPages. "Breathing exercise to cure diabetes and cancer " , "Keep away swine flu; rejuvenate your body immune system naturally". & "Breathing Exercises: Seven Pranayams"

To know more about Natural Healing, click on following links :-

http://medicinesnaturally.com/2008/11/what-is-natural-healing/

This article is of informatory nature only and does not claim any professional authority. In health matters, one must consult the health care professionals to know more but its individual judgement which  counts and only the individual is responsible for his or her decision.