Heart Disease
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4. MAINTAIN HEALTHY IMMUNE SYSTEM TO AVOID HEART AND OTHER
DISEASES
What is Immune System?
4.1 Immune system is the capability of the body to fight against any alien viral, bacterial, fungal or cellular attack. You constantly come in contact with many pathogens like bacteria and viruses that have the potential to make you ill. Rather than being an organ system, it works by using components of the lymphatic and circulatory systems. Nature has developed this highly complex and wonderous inborn defence mechanism to fight against any viral, fungal, bacterial or cellular attack. Nature has gifted the body to develop antibodies for shooting away or resisting infections by foreign bodies through this strong immune system.
White Blood Cells
4.2 As integral component of the immune system, the white blood cells or leukocytes, defend the body against infection and disease. They begin their lives as immature cells in the bone marrow. As they mature, leukocytes become specialised for specific functions. The leukocytes that are important in the immune response are the macrophages, neutrophils and several types of lymphocytes. The macrophages can surround and digest harmful bacteria and other invaders. Some can move from the bloodstream to the fluid that surrounds the body cells to reach the site of infection. The lymphocytes, like trained “soldiers” are involved in the production of antibodies (defence proteins) in recognising and destroying specific types of cells, and in remembering a specific pathogen (a disease causing microorganism) in case it is encountered again. Some of the immature lymphocytes leave the bone marrow and go to the thymus gland. There they undergo a change and become one of the different types of “killer” T-cells of the immune system to inhabit the blood, lymph nodes and spleen.
Immune System Soldiers
4.3 Like any modern army, the immune system has specially trained “soldiers” equipped to handle specific attacks. Macrophages literally surround and engulf the enemy – harmful microorganisms; T-cells, sometimes, called “natural killers”, grapple with invaders including cancer cells, in hand-to-hand combat; T-cells produce antibodies specifically designed to seek out and destroy targeted germs; neutrophils serve as the foot soldiers for this internal army. Lightly armed, the neutrophils are often among the first to enter fray enmass sacrificing in large numbers to keep the body healthy. There are also helper T-cells to assist in “combat control” and suppressor T-cells to help calm things down once the battle has been won.
4.4 Although they posses tremendous power, the immune system soldiers are absolutely dependent on their supply system. Without the proper nutrients to keep it strong, our internal army would quickly weaken and be overrun by the enemy – the diseases. What do our immune soldiers require? The same macronutrients, comprising proteins, carbohydrates and fats, and micronutrients, comprising vitamins, minerals, phytochemicals and other substances that keep the rest of the body healthy. A deficiency of even a single vitamin or mineral can hamper the immune system, reducing the production of T-cells, impairing their ability to ingest foreign bodies, interfering with the manufacture of antibodies by the T-cells, or otherwise weakening our internal army. The signs of low immunity can include repeated infections or sore throat, slow wound healing, enlarged lymph glands (neck, underarm, groin), unexplained fatigue or lethargy, allergies, more than two colds a year.
