Sugar Land - Visiting Nurse Assn.
Allergies are disorders of the immune system.
The result of an allergen entering a susceptible person's body may include wheezing, itching, runny nose, and watery or itchy eyes, and other symptoms. The purpose of the immune system is to keep infectious microorganisms, such as certain bacteria, viruses, and fungi, out of the body, and to destroy any infectious microorganisms that do invade the body. The immune system is made up of a complex and vital network of cells and organs that protect the body from infection. The blood vessels and lymphatic vessels are important parts of the lymphoid organs, because they carry the lymphocytes to and from different areas in the body. Each lymphoid organ plays a role in the production and activation of lymphocytes.