This is a group of immune cells specialized in research and "eat" bacteria, viruses and cells in the body dead or wounded. There are three main types of granulocytes, macrophages and dendritic cells.
Granulocytes often at the helm for the first time during an infection. They attack the invaders in number, and "eat" until they die. Pus from infected wounds consists primarily of granulocytes died. A small part of the community of granulocytes has specialized in attacking large parasites like worms.
The first part of the immune system reacts to invaders such as bacteria are a group of proteins called the complement system. These proteins in the blood flows freely and can quickly take the place of an invasion that can react directly with antigens – molecules that the body recognizes as foreign substances. Once activated, complement proteins may
- Trigger inflammation
- Attracting cells as macrophages in the dining room
- Wrap the intruder high cells are more likely to consume
- Kill the invaders
This is a group of immune cells specialized in research and “eat” bacteria, viruses and cells in the body dead or wounded. There are three main types of granulocytes, macrophages and dendritic cells.
Granulocytes often at the helm for the first time during an infection. They attack the invaders in number, and “eat” until they die. Pus from infected wounds consists primarily of granulocytes died. A small part of the community of granulocytes has specialized in attacking large parasites like worms.
Macrophages (”big eaters”) are slower to react to invading granulocytes, but are larger, live longer and have a much greater capacity. Macrophages also play a key role to alert the rest of the immune system invaders. The white blood cells called macrophages, monocytes begin. Monocytes leave the blood stream walk in macrophages.
Dendritic cells “eat” the cells and devour intruders, as well as granulocytes and macrophages. And as macrophages, dendritic cells help the activation of the immune system more. They are also able to filter body fluids to eliminate foreign organisms and particles.
White blood cells called lymphocytes in the bone marrow, but migrate to other parts of the lymphatic system, including lymph nodes, spleen and thymus. There are two main types of lymphatic cells, T cells and B lymphatic system also includes a transportation system – lymph vessels – for transportation and storage of lymphocyte cells in the body. Lymph feeds the cells in the body and filters out dead cells and invading microorganisms such as bacteria.
On the surface of each cell’s receptors lymphocytic enable them to recognize foreign substances. These receptors are highly specialized – each of which may correspond to a specific antigen.
To understand the recipient of a hand that can not have a particular item. Imagine that your hands could pick apples. You would be a true champion of the collection of apples – but would not be able to choose something else.
In your body, each receiver just like a hand in the quest for “apple”. The cells travel through your body until they find an antigen size and shape to meet their specific receptors. It seems that the limits of beneficiaries of each cell-cell can correspond to a specific type of antigen, but the body compensates by producing different lymphocytes that the immune system can recognize almost all intruders.
T cells are of two types of helper cells and natural killer cells. They are called T-cells by the thymus, an organ under the breastbone. T cells are produced in the bone marrow and then move to the thymus where they mature.
Helper T cells are the main driving force and key regulators of the immune system. Its main task is to activate B cells and killer T cells. However, the helper T cells themselves to be activated. This occurs when a dendritic cell or macrophage, which had an intruder, move the lymph node closest to providing information about the pathogen caught. Committee phagocytes antigen fragment of intruders in their own region, a process called antigen presentation. When the recipient of a helper T cell recognizes the antigen, the T cell is activated. Once activated, helper T cells begin to divide and produce proteins that activate T and B cells and other immune cells.
Killer T-cells are specialized to attack cells infected by viruses and sometimes by bacteria. They can also attack the cancer cells. Killer T-cells have receptors that are used to find each cell that is. If a cell is infected, it is quickly killed. Infected cells are recognized by small traces of the intruder, the antigen is found on the surface.
Searching for B cells to the antigen corresponding to their receptors. If you find that the antigen, it is connected, and in B-cell start trigger signal. Cell B is now protein produced by T cells helps to be fully activated. When this happens, the B-cell begins to divide to produce clones of themselves. During this process, two types of cells, developing new plasma and memory B cells.
The plasma cell is specialized in the production of specific proteins called antibodies, which react in the same antigen, which coincided with B-cell receptor antibodies are released from the cell plasma so they can seek help and to destroy invaders. Plasma cells produce antibodies with incredible speed and can get tens of thousands of antibodies per second.
When the antibody is in the form of a corresponding antigen, attaches to it. The bound antibodies used for coating desirable hot cells as macrophages. Antibodies also neutralize toxins and deactivate the virus, preventing it from infecting new cells. Each branch of the Y-shaped antibodies can bind to another antigen, so that the branch is attached to an antigen in a cell, the other arm can bind to another cell – this method of collection agents pathogens in large groups easier to phagocyte cells to devour. Bacteria and other pathogens coated with antibodies are also more likely to be attacked by the proteins of the complement system.
The memory cells are the other type of cells produced by cell division B. These cells have a long life and can not “remember” specific invaders. T cells can also produce memory cells with a lifespan longer than memory B cells. The second time, an intruder tries to invade the body, B cells and memory T help activate the immune system much faster. The invaders are removed before the infection of human experience symptoms. The Agency was granted immunity from intruder.