Role of Immune System and Immunization in the Body

role of immune system and immunization in the body

Every time your body is under the attack of bacteria, viruses and more living stuffs want to enter your body and use its resources for itself. You may get suffer with fever, cough, cold, measles, and tetanus.  Immune system of the body plays an important role in the body. It is a powerful army of cells, collection of processes and structures within the body which protects against the potentially damaging foreign bodies or other disease. Immune system when working properly identifies a variety of threats, including parasites, viruses, and bacteria. It also distinguishes them from the body’s own healthy tissue.

Types of Immune System

  1. Innate Immune System – We all are born with some level of immunity in the body. This immunity fight against the foreign viruses and bacteria’s from day one. Innate immunity is also well known as the external barriers of our body the first line of defense against pathogens for instance skin and the mucous membranes of the throat and gut.
  2. Adaptive Immune System – Adaptive immune system is composed of highly specialized, systemic cells and processes that protect, eliminates and prevents the growth of pathogens.

 Main Parts of Immune System

Immune system includes antibodies, white blood cells, lymphatic system, complement system, spleen, thymus and bone marrow as its parts and they actively fight against infection.

  1. Antibodies- Antibodies are produced by the plasma cells and used by the immune system to neutralize the foreign pathogens that entered in the body.
  2. White Blood Cells- White blood cells are also well known as leukocytes. These cells move throughout the body in search of invaders.
  3. Lymphatic System- In lymphatic system small glands placed throughout the body and linked by lymphatic vessels.
  4. Complement System- Work done by antibodies is complemented by the complement system in the body.
  5. Spleen- Spleen filters the blood and located in the upper left of the abdomen.
  6. Thymus- It is a gland between the lungs and located below the neck.
  7. Bone Marrow- It is found in the center of the bones and produces red blood cells.


A new born child has a little level of immunity in the body. The child’s immune system is weak to fight against the viruses and bacteria which enter his/ her body. That’s why the immunization is important. A vaccine is injected in the body and the body makes the antibodies to it. A vaccinated child or person when exposed to a foreign virus or bacteria won’t get infected. Vaccinations are available against many diseases, so consult or discuss your immunization needs with your doctor.