How does disease affect organism?

Answer 1

Any disease can affect the organ system because it invades the body and alters the way things work. Different diseases will affect different organ systems. This diseases can be caused by genetics, bacteria, poor nutrition, viruses, parasites and fungi. Diseases will damage or change the way the organ system works, causing harm to the body.
Disease affects an organism by disrupting the organism's homeostasis. Homeostasis is the process by which an organism maintains a steady internal environment (stable body temperature, blood sugar level, electrolyte balance, etc.). A disease will disrupt this process.

For example, Helicobacter pylori (the bacteria responsible for most stomach ulcers in humans) disrupts homeostasis by interfering with the production of the mucus layer that protects the stomach lining cells from the hydrochloric acid in the stomach lumen.

Answer 2

disease affect organism in different ways at different levels of the organism ,for example , cancer affects cells , flu affects the respiratory system,etc....................

Answer 3

The organ that is affected with the disease may not function properly.