Definition
noun
Antigen that enters the body of the organism from the outside, e.g. through inhalation, ingestion, or injection.
Supplement
Exogenous antigens include particles considered foreign within the organism. For example, allergens (such as pollen), proteins from transplanted tissues and organs, and parts of microorganisms (such as coat, capsule, cell wall, flagella, fimbria, or toxin of bacteria, viruses, etc.) can serve as antigens.
Word origin: French exogène : Greek exō-, exo– (outside) + French –gène, –gen (yielding, producing) + antigen.
Compare: endogenous antigen
See also: antigen
Dictionary > Exogenous antigen
You will also like...

Circulation
The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..

Plant Water Regulation
Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adap..

Geological Periods
Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..

Growth and Plant Hormones
Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..

The Hominids
The hominid family diversified from the apes around 6 to 8 million years ago. Since then, the evolutionary path has prov..

New Zealand’s Unique Flora
If New Zealand has lots of unique animals, it's also got a whole lot of unique plants. Find out more about some of them,..