what is the function of immune system?
Answers
Answer:
The immune system has a vital role: It protects your body from harmful substances, germs and cell changes that could make you ill. It is made up of various organs, cells and proteins. As long as your immune system is running smoothly, you don't notice that it's there....
Explanation:
The role of the immune system — a collection of structures and processes within the body — is to protect against disease or other potentially damaging foreign bodies. When functioning properly, the immune system identifies a variety of threats, including viruses, bacteria and parasites, and distinguishes them from the body's own healthy tissue, according to Merck Manuals.
Diseases of the immune system
If immune system-related diseases are defined very broadly, then allergic diseases such as allergic rhinitis, asthma and eczema are very common. However, these actually represent a hyper-response to external allergens, according to Dr. Matthew Lau, chief, department of allergy and immunology at Kaiser Permanente Hawaii. Asthma and allergies also involve the immune system. A normally harmless material, such as grass pollen, food particles, mold or pet dander, is mistaken for a severe threat and attacked.