The immune system is a collection of organs, tissues, and cells that work together to protect the body from infection. The immune system fights off invading organisms such as bacteria, viruses, and parasites. It also protects the body against cancer cells. The immune system is divided into two parts: the innate immune system and the adaptive immune system.
The innate immune system is the first line of defense against infection. It includes the skin, tears, and mucus membranes. These barriers protect the body from infection by keeping out foreign organisms. The innate immune system also includes white blood cells such as neutrophils and macrophages. These cells attack and destroy bacteria and other invading organisms.
The adaptive immune system is the second line of defense against infection. It includes white blood cells called lymphocytes. Lymphocytes are divided into two types: B cells and T cells. B cells produce antibodies that attack bacteria, viruses, and other invading organisms. T cells destroy cancer cells and other abnormal cells.
The immune system works by recognizing and attacking foreign organisms. White blood cells called lymphocytes recognize foreign organisms by their unique proteins. These proteins are called antigens. Lymphocytes produce antibodies that specifically bind to the antigens on the foreign organism. The antibodies attach to the organism and destroy it.
The immune system is also responsible for preventing the body from attacking its own cells. This is called self-tolerance. Lymphocytes that recognize the body's own cells are called self-reactive lymphocytes. Self-reactive lymphocytes are destroyed by the immune system so that they cannot attack the body's own cells.
The immune system is a complex network of organs, tissues, and cells that work together to protect the body from infection. The immune system fights off invading organisms such as bacteria, viruses, and parasites. It also protects the body against cancer cells.
There are many things you can do to boost your immune system. Some of the most effective ways to boost your immune system are to eat a healthy diet, get enough exercise, and get enough sleep. You can also boost your immune system by taking supplements such as omega-3 fatty acids, probiotics, and vitamin D. And finally, you can boost your immune system by using essential oils such as frankincense, lavender, and lemon.
Clinical immunology is the study of how the immune system works and how it can be used to treat disease. Clinical immunologists use their knowledge of the immune system to diagnose and treat diseases such as cancer, autoimmune diseases, and infections. They also use their knowledge of the immune system to develop vaccines and new therapies for treating disease. These vaccines and therapies are called immunotherapies.
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