Why is immune system essential for our health?

Answer

A

Explanation

The human immune system consist of lymphoid organs, tissue cells and antibodies. The immune system recognises foreign and generates an immune repsonse and remembers them.
An immune response is the way in which the human body responds of specific pathogens or antigens. These response involve the production of cells (lymphocytes) and chemicals (antibodies), that are designed to defend the body against the pathogens.
Antigens are substances that can activate an immune response. Antigens trigger the production of antibodies (glycoproteins or immunoglobulins) by the immune system. Each type of antibody is specific to a particular and reacts with it to render it harmless.