T-Cell Fights Of Bacteria And The Immune System

Imagine the bacteria as robbers trying to invade a house, the body in this analogy. The immune system is the police officers in charge of the house, and the meninges are the alarms around the point of the house that the robbers want to come in through. The robbers trick the police officers into helping them rob the house. The robbers used the police officers, originally intended to do good.

Lymphocytes are vital to the human body to protect us against disease and initiate an immune response. Each person possesses billions of lymphocytes which collectively provide an individual with the ability to respond to a huge variety of antigens. The wide

The immune system is made up of several types of cells that work together to fight infections. Lymph cells (called lymphocytes) are the main type of cell in the adaptive immune system. There are 2 types of lymph cells: T cells and B cells. When B cells respond to an infection, they change into plasma cells. The plasma cells are found mainly in the bone marrow—the soft, inner part of some bones. The plasma cells

Lymphocytes- These leukocytes are comprised of B and T cells. B cells secrete antibodies and the T cells kill infections. Therefore lymphocytes aid in defending the immune system.

1. Normally, the immune system protects the body from infection by identifying and destroying bacteria,

The Human Body is an oasis of life. Still, every waking moment of our lives, our bodies endure vicious attacks. Bacteria, viruses, fungi, microbes, toxins, and parasites - I like to think of them as invaders from the outside world. Each invader is equipped with its own specialized method of attack. On a microscopic level, our bodies fight a life-long war. As the battle rages, our immune system kicks in and protects us against the perils of illness. The immune system is not made up of one particular tissue or organ. Instead, an arsenal of defense cells; including lymphocytes, bone marrow, and leukocytes join forces to keep us healthy. Besides the occasional times we get caught in the crossfire with a common cold, a healthy immune system keeps

The human immune system creates a series of responses in the body to defend the body. If a foreign organism, such as a virus or a cold invades your body, it recognizes these foreign organisms, and, in turn, attacks them to get rid of them. One can think of the immune system as an army of many cells which have set up their own bastion in the human body. They have only one job: To defend. The immune system’s cells are various kinds of white blood cells. The human body typically creates about 1000 million white blood cells on a daily basis. A group of these cells, macrophages, establish a patrol of sorts throughout the body killing germs as soon as they enter the body. However, sometimes an infection can cause the macrophages to succumb to it. The body begins to fight back with stronger T- and B-cells.

The immune system is made up of trillions of specialised cells (white blood cells) that detect and destroy pathogens or their toxins. Some white blood cells, which are

Strep throat is a caused by streptococcus that take over the cells in the throat. It affects the immune system. The immune system is a system that fights back pathogens. If germs infect the immune system, it can cause you to get sick. “The immune response controls the immune system.” (Human Biology and Health 148). “The cells of the immune system can choose between different kinds of pathogens. The immune system cells react to each kind of pathogen with a defense targeted specifically at those pathogens.” (Human Biology and Health 148). “The white blood cells that choose between different kinds of pathogens are called lymphocytes. There are two big kinds of lymphocytes, T lymphocytes and B lymphocytes, otherwise known as B cells and T cells that work together to destroy pathogens such as flu viruses.” (Human Biology and Health 148).

Their two primary jobs are to ensure antibody production against the appropriate target antigen occurs and there is presentation of antigen to T cells and signals for T cell activation are provided. B cells provide protection of the host by producing antibodies that identify and neutralize foreign objects like viruses. These B cells then differentiate into plasma cells and memory cells. Plasma cells are terminally differentiated B cells that remain committed to the continuous production and secretion of antibodies. Each plasma will synthesise and secret only one type of antibody. Memory B cells are long-lived B cells that have specialised to remembering the type of substances that the immune system has seen before, they are primed for rapid response to repeated exposure of the antigen. Memory B cells are generated in the lymphoid tissue and migrate to the lymph nodes and reside in the ready mode for activation in order to quickly recognise and attack any returning virus. T cells attack cells that have become infected by viruses, there are two types of T cells the T-helper cell ad the cytotoxic T cell. T-helper cells do not attack infected cells directly, instead they release chemical messengers known as cytokines that signal differentiation, growth and action of other immune cells. Cytotoxic T cells go around in the body looking for and wanting to destroy pathogenic cells directly. Cytotoxic T cells attach to the compromised cell and release chemical factors that are able to kill their targets by programming then to undergo apoptosis. * Dendritic

Lymphocytes are a type of white blood cell, which are an important part of the immune system. Lymphocytes can defend the body against infection because they can distinguish the body’s own cells from foreign ones. Once they recognize foreign material in the body, they produce chemicals to destroy that material. Two types of lymphocyte are produced in the bone marrow before birth.

The organs that make up the lymphatic and immune system are the tonsils, spleen, thymus gland, lymph nodes, and lymphatic vessels. White blood cells (leukocytes), red blood cells (erythrocytes), plasma, and platelets (thrombocytes) make up the blood. Lymphocytes are leukocytes (white blood cells) that help the body fight off diseases. Two types of lymphocytes are B cells and T cells. Lymphocytes recognize antigens, or foreign substances/matter, in the body. Lymphocytes are a classification of agranulocytes, or cells (-cytes) without (a-) granules (granul/o) in the cytoplasm. B cells are created from stem cells, which are located in the bone marrow. B cells respond to antigens by becoming plasma cells. These plasma cells then create antibodies. Memory B cells produce a stronger response with the next exposure to the antigen. B cells fight off infection and bacteria while T cells defend against viruses and cancer cells. A hormone created by the thymus gland called thymosin changes lymphocytes into T cells. The thymus gland is active when you are a child and slowly shrinks, as you get older. T cells bind to the antigens on the cells and directly attack them. T cells secrete lymphokines that increase T cell production and directly kill cells with antigens. There are three types of T cells: cytotoxic T cells, helper T cells, and memory T cells.

The immune system is an important and complex part of the human body, guarding it against bacteria

Have you ever wondered how your body works? Did you ever think about how your body defends itself from outside invaders? Remember the last time you were sick. Did you know how your body fought and killed the sickness? All these questions can be answered by learning about one of the most important systems in your body, the immune system.

Our immune system is the second most complex system in our body. It is made up of organs, cells and proteins that work together to protect our bodies from harmful bacteria, viruses or other microorganisms that can cause diseases. Usually we don’t notice our immune system defending us against pathogens, but if the pathogen (harmful microorganism) is aggressive or if our body hasn’t ever come into contact with it, we can get sick. The jobs of our immune system are to recognise pathogens, as well as neutralise and remove them from our body. Our immune system also has to fight our own cells if they have changed due to an illness, for example, cancer. (1)