How does the human body fight?
Human bodies have a number of strategies to fight or prevent them. Our whole device for fighting infection is called the "immune system". The immune system of the human body does not only include white blood cells that try to capture and destroy bacteria, but a number of mechanisms that prevent bacteria prevent infection. For example, the skin, our largest organ, constantly fights infection or avert the infection by acting as a barrier against foreign, inhumane cells. Other parts of our bodies or content in our bodies are always on guard to fight infections. Human bodies use various acids in organs that create a hostile environment for foreign cells. In our body we also host useful bacteria that help keep other bacteria entering the body under control.
In addition to these congenital immunity, the body begins to function very hard at the beginning of the infection to capture and killilo infection. When foreign bacterial, viral or parasitic cells try to deal with stay in our body, it activates a specific type of white blood cells called neutrophily . You can imagine neutrophils as small army bases placed in the body that are called into action and ready to fight infections when foreign cells appear in the body.
essentially, when the body meets infectious agents, neutrophils flood the area where the "invasion" takes place. They can stick to bacteria or mushrooms and make them immovable or unnecessary, or they can release chemicals that kill bacteria. They can also be on catches, destroy and eat missions in which they fight against death infections.
Our bodies also learn to recognize infectious agents, which often makes us immune to viruses or bacteria that we were previously exposed to. The primary actors in what is called the acquired immune response are lymphocytes , also the type of white blood cells. Lymphocytes are two types called b and t cellsAnd they are usually made from the bone marrow of our bodies and thymus.
When a recognizable "attacker", something that the body has been exposed to the previous time, enters the body, B and t cells travel to the invasion site. T cells release proteins that help stimulate B cells, and can also stimulate the death of our body cells to prevent the spread of infection. B cells are cells of "killers" that immediately begin to fight infections.
t cells can also release chemicals that cause specialized B cells called phagocytes , to create answers in the body that create an inhospitabulka environment for infection. For example, fever is a reaction to the presence of body phagocytes, and higher temperatures in the body can actually fight against infections by "cooking" foreign cells.
These accurate effects of the human body to combat infections can be disrupted if the number of white blood cells is low. This is reflected in a less effective immune system that may not be able to fight easilyagainst infections. In some cases it is necessary to disrupt the immune system because it omits it. People with autoimmune diseases have an inappropriate immune response to cells that should exist in their body. Some conditions such as lupus and HIV cheat immune cells to believe that other cells in the body are "alien". This causes cellular death and dysfunction of organs by "friendly fire". The body, in other words, attacks himself.
alternately, when people have a transplant, they try to destroy the transplanted organs because they are foreign to the body. This is to the recipient of the organs must take immunosuppressive drugs to prevent the body to fight against what it perceives as strange. The disadvantage of immunosuppressants is that the body makes it more vulnerable to other foreign attackers, such as bacteria and viruses that can cause infections. In other words, the closure of events that fight against infections in the body is often reflected in a greater occurrence of infections.