How does our immune system work?
Different groups of cells work together against just about any pathogen or germ. But illness can occur if the performance of the immune system is compromised.
What do immune systems do?
Without an immune system a human being would be just as exposed to the harmful influences of pathogens as to changes harmful to health happening inside of the body.
Markers of Self Epithelial- Muscle cell cell Leukocyte Nerve cell Arnwork by Jeanne Kely 2004 Class I MHC self-marker protein
Markers of Non-Self Bacteria SARS virus Antigen- Epitope Antibody Non-self nerve cell Non-self leukocyte Antigen Epitope Class I MHC protein Antibody
There are two main parts of the immune system Immune system Innate immunity First line of defense Selective but non-antigen specific Gate keeper of adaptative immunity Adaptative immunity Antigen specific Memory B and T Lymphocytes Macrophage Dendritic NK NK.T Tyo cells