What is a Disease?

A disease is a disorder of structure or function in a human, animal, or plant, especially one that produces specific signs or symptoms or that affects a specific location and is not simply a direct result of physical injury.

When a disease is infectious it can be caused by pathogens. Examples are bacteria, viruses, fungi, or protists. A noninfectious disease are likely to have causes such as lifestyle factors, environmental toxins, or your genes. Examples of these are diabetes and cancer.

The Immune System

The structures in the immune system are the tonsils and adenoids, the thymus, the lymph nodes and lymphatic vessels, the spleen, bone marrow, appendix, and peyer’s patches.

There are many simple ways to keep your immune system healthy. Some of them are eating healthy and balanced diet with many fruits and veggies, don’t smoke or drink, exercise often, get a good amount of sleep and relieve your stress, make sure your meat is cooked all the way and wash your hands frequently.