Essay --

In normal cases the resistive systems white blood cells protect the automobile trunk from harmful substances, called pathogens. A pathogen is anything that tries to harm the body. Some examples of pathogens atomic number 18 fungi, bacteria, protozoans, and viruses, and blood or tissues from another species or person. The tolerant system produces antibodies that destroy these harmful substances. An antibody is standardised a protein marker produced by B-Cells to identify foreign objects. Unfortunately, as effective the immune system is for our bodies, there are many another(prenominal) disorders and diseases related to it. tolerant system disorders cause low immune activity or everywhere immune activity in the immune system. During immune system over activity cases, the body damages and attacks its own tissues these diseases are known as autoimmune diseases. Immune deficiency decreases the bodys ability to fight pathogens, causing a higher chance for infection.Allergies are an example of the immune systems over-activity diseases. Allergies occur when the immune system reacts to foods or substances that are not harmful. The most common allergens are pets and pollen. When the immune system senses an allergen, it releases unneeded chemicals. Histamine for example, is one of the chemicals that are released after the immune system senses an allergen it triggers an inflammatory response. Allergic reactions like this have many symptoms that plenty include breathing problems, eye irritation, rash, even nausea and vomiting. Asthma is a condition where the immune system becomes over-active in the bronchi. Many people with asthma suffer constriction in their bronchial tubes, which make it harder to breath. An asthma give persons airways are almost always under inflammation. There is no totality cure f... ...rittle bones, and death 20% of people who have a thyroid gland storm die.The final immune disorder I want to list is immunodeficiency. Immunodeficiency i s the failure of the immune system to protect the body from harmful substances and infection. more or less of the time it is caused by the absence of some components needed. The main cause of immunodeficiency slightly the world is the Human immunodeficiency Virus (HIV). HIV attacks and kills a crucial procedure of the immune system T helper cells. T Helper-Cells kills give cells. And without T-Cells many other immune cells cannot work properly, including B-Cells that make antibodies. A person infected with HIV may not show any signs or symptoms for years. save as HIV kills more and more T-Cells die the body becomes more vulnerable to infection. And when infected cells outnumber uninfected cells, then the patient volition have AIDS.