Human immune system pdf

If the immune system is crippled, other kinds of diseases result. This network of tissues, cells, and organs first tries to keep out germs like bacteria, viruses, fungi, and parasites and then deals with them if they manage to get in. New research on how yoga boosts your immune system. This signal triggers inflammation, which causes the blood vessels to dilate and increase blood flow. Pdf introduction to the immune system researchgate. When functioning properly, the immune system identifies and attacks a variety of threats, including viruses, bacteria and parasites, while distinguishing them from the bodys own healthy tissue.

When the immune system hits the wrong target, however, it can unleash a torrent of disorders, including allergic diseases, arthritis, and a form of diabetes. Students are continually exposed to germs, from doorknobs, railings, you name it. These activities will help your students learn about how the immune system protects them from germs and illness. Human immune system diagram how it works live science.

If it senses something in your body that could be bad for you, it triggers the release of special cells. Organs, tissues and cells of the immune system the immune system consists of a network of lymphatic organs, tissues, and cells. The brain sends an alert signal out to the immune system. Crucially, it can distinguish our tissue from foreign tissue self from nonself. These structures are supported by the reticuloendothelial system. The immune system protects the body against disease or other potentially damaging foreign bodies. The immune system is spread throughout the body and involves many types of cells, organs, proteins, and tissues. Some forms of arthritis and diabetes are autoimmune diseases. But fortunately, our immune systems are on duty to battle germs that could make us ill. When this happens, a team of white blood cells, or leukocytes macrophages and lymphocytes, flocks to the scene of the crime.