1. Immune System<br />Immune system means in smaller picture to keep us healty and in bigger picture to keep us alive. It protects against diseases by identifying them and killing pathogens and tumor cells. Different pathogens are: proteins, viruses, bacteria, parasites, fungi.<br />Immune System can be divided into two parts:<br />I Non-Specific or Innate Immunity<br />The first life of that works as barrier that tries to keep things out.<br />-Skin/skin oils<br />- Mucous membranes(It consists Chemicals that makes it difficult to survive for bacterias) <br />-Stomach acid <br />The second line<br />-Inflammatory Response – It is a response of the organism to the pathogenes. It brings blood cells to fight with infection. <br />-Phagocytes – Phagocytes are the white blood cells that protect the body by ingesting harmful foreign particles, bacteria and dead or dying cells.<br />Simplified they eat phatogenes. They have molecules called receptors on their surface that can detect harmful objects. It will trap around the pathogene and it will eat it and after that it breaks the intruder.<br />Phagocytes are divided into quot;
professionalquot;
or quot;
non-professionalquot;
depending on how effective they are. Professional phagocytes have molecules called receptors on their surfaces that can detect harmful objects, such as bacteria. There are main 3 classes of them: neutrophils, monocytes, macrophages and dendritic cells.<br />II Specific or Adaptive Immunity<br />-Lymphocyte<br />--B Lymphocytes - Produced in bone marrow (luuüdi)<br />Effect - Humoral response – It means a production of antibodies which will defuse the infection. <br />--T Lymphocyte – Produced in a organ Thymus<br /> Effect - cell mediated response – It means a activation of macrophages(Õgirakk).<br />
