Yee+Ting

Yee Teng __7 Most Important Keywords:__ Humoral Respond - is how the phagocytes engulf the pathogens Inflammatory Respond - Bring B - cells and T - cells to fight the pathogens B - cells - mature and found in the bone marrow and it is a type of white blood cells T - cells - mature and found in the thymus Helper T - cells - help and block away the receptor that connects to the pathogens Suppressor T - cells - helps the immune system to become normal again Killer T - cells - kill of harmful cells only

Lines of defense explanation: Everyday and every minutes there are bacteria around us, it is not possible that no bacteria would want to infect you. They want to but our immune system has all sorts of different defense that have made to protects us from getting sick. There are three defense in total and they all play a different roles in our body. The 1st line of defense are the barriers on our body, such as the skin, hair, nails, mucus and etc. As for the 2nd line of defense they are the Inflammatory respond and the phagocytes. They plays a part on engulfing on the harmful bacteria and the 3rd lines of defense are the white blood cells. Now I had explain what the lines of defense is we can move on to the next part. Which is how pathogens infect our body?

So take for a example that a colony of pathogens enter through your nose, most likely if will be kill of from the enzymes in the nose which are the mucus and then either you will sneeze or sallow it in to your stomach. Which the either the pathogens will spread from your sneeze or it would get killed of in your stomach(Stomach acid). Lets just use another example which where the pathogens get pass your body's 1st line of defense from the skin and down it went into your blood stream. Then this is where the humoral respond starts which is then the 2nd line of defense would take part by engulfing the pathogens using B -cells and T-cells. The T -cells are found in the thymus and if the pathogens get into the thymus the T -cells will take action, if not the B -cells. Also it is also the same for B -cells, it depends where the pathogens ends up getting into. Just an example if it ends up on the thymus there are three types of different T -cells. The helper T-cells, the suppressor T -cells and the killer T-cells. The helper T-cells helps to block away the receptors that is connects to the pathogens. As for the suppressor T -cells is help to settle down the problem bringing the infected cells to a end and the last T -cells are Killer T -cells. Which helps to figure out the harmful cells and kill them if found.

Three Lines of Defense Mind map: