Skip to main content

Immunity and immune system

Immunity;
                 Every day we are exposed to large number of infectious agents. However only a few
of  these exposures result in disease. why? This is due to the fact that our body is able defend itself
from most of these foreign agents. This overall ability of the host to fight against the disease causing
organisms, conferred by the immune system is called Immunity.
                        Immunity is of two types ;
  •      Innate Immunity;
                          Innate immunity is non-specific type of defence, that is present at the time of birth this is accomplished by providing diffrent types of barriers to the entry of foreign agents into our body the four type of barreirs are :-
  1.  physical barriers
  2.  physiological barriers
  3.  cellular barriers
  4.  cytokine barriers
  •     Aquired Immunity;
                                 Aquired Immunity, On the Other hand is pathogen specific. It is charecterised by memory. This means that our body when it encounters a pathogen for the first time produces a response called primary respons which is of low intensity. Subsequent encounter with the same pathogen elicits a highly intensified secondary respons this is ascribed tothe fact that our body appears to have memory of the first encounter.


Immune System;
                      The Human immune system consists of lymphoid organ,Tissues,cells and soluble molucule like anti bodies. Immune system is Unique in the sense that it recognises antigens, responds to these and remember them.The immune system also plays an important role in alergic reactions, auto-immune diseases and organ transplantation.
Labels:
Location: 1, Court Rd, Great Jalinagara, Devaraj Urs Badavane, Davanagere, Karnataka 577001, India

Comments

Post a Comment

Popular posts from this blog

Detection and treatment of cancer

  Detection and treatment of cancer Early detection of cancers is essential as it allows the disease to be treated successfully in many cases. Cancer detection is based on biopsy and histopathological studies of the tissue and blood and bone marrow tests for increased cell counts in the case of leukemias. Biopsy ; In biopsy, a piece of suspected tissue cut into thin sections is stained and examined under microscope (histopathological studies) by a pathologist . Techniques of detection Techniques like radiography (use of X-rays), CT (computed tomography) and MRI (magnetic resonance imaging) are very use full to detect cancer of the internal organs. Computed tomography;   This technique uses X-rays to generate a three dimensional image of the internals of an object. Magnetic resonance imaging (MRI);  MRI uses strong magnetic fields and non-ionising radiations to detect accurately pathological and physiological changes in the living tissues. Antibodies against cancer-specifi...
2 comments
Read more

Cancer and its causes

  Cancer Cancer  is one of the most dreaded diseases of human beings and is a major cause of death all over the globe. More than a million Indians suffer from cancer and a large number of them die from it annually.   Causes of cancer;   In our body, cell growth and differentiation is highly controlled and regulated. In cancer cells, there is breakdown of these regulatory mechanisms. Normal cells show a property called cotnact inhibition by virtue of which contact of other cells inhibits their uncontrolled growth. Cancer cells appears to have lost this property. As a result of this, cancerous cells just continue to divide giving rise to masses of cells called tumors. Tumors are of two types;                     1.   Benign tumor and                     2.   Malagnant tumor Transformation of normal cells into cancerous neoplastic cells may b...
1 comment
Read more

AIDS

AIDS;    How AIDS cause? Can you recover from AIDS？Can AIDS kills？What are HIV/AIDS? Where did HIV come from? How do I know if I have HIV? you have all these questions in your mind then lets see the HIV/AIDS: causes symptoms treatments and more.     The word AIDS stands for Acquired Immune Deficiency Syndrome. This means deficiency of immune system, acquired during the lifetime of an individual indicating that it is not a congenital disease. Syndrome means a group of symptoms. AIDS was first reported in 1981 and in the last 25 years or so, it has spread all over the world killing more than 25 million persons. Cause;  AIDS is caused by the Human Immune Deficiency Virus (HIV), a member of group of viruses called retrovirus. Transmission of HIV-infection generally occurs by a) Sexual contact with infected person b) By transfusion of contaminated blood and blood products  c) By sharing infected needles as in case of intravenous drug abusers and...
Post a Comment
Read more