ANATOMY

Detailed explanation-1: -antibody, also called immunoglobulin, a protective protein produced by the immune system in response to the presence of a foreign substance, called an antigen. Antibodies recognize and latch onto antigens in order to remove them from the body.

Detailed explanation-2: -The immune cells produce antibodies to fight off pathogens.

Detailed explanation-3: -Stomach acid is a chemical barrier against infection. It is hydrochloric acid and is strong enough to kill any pathogens that have been caught in mucus in the airways or consumed in food or water.

Detailed explanation-4: -The chemical substance that enhances the immune response in an organism is called antigen.

Detailed explanation-5: -Your immune system is a large network of organs, white blood cells, proteins (antibodies) and chemicals. This system works together to protect you from foreign invaders (bacteria, viruses, parasites, and fungi) that cause infection, illness and disease.