13.2 Immune System
They fight infection by causing pathogens to clump, by making them ineffective, or by activating complement proteins
What are three ways that antibodies help fight infection?
immune system
body system that consists of organs, cells, and molecules that fight infections
inherited immunity
immunity passed from a mother to a fetus or through mother's milk
passive immunity
immunity that is transferred through DNA, the placenta, or mother's milk, passed down from person to person
active immunity
immunity that occurs when a pathogen enters the body and prevents a person from getting sick by the same pathogen
genetic immunity
immunity transferred through DNA
basophils (B cells)
release chemicals called histamines in response to the invasion
circulatory system
- transports white blood cells to the infection site - fights against pathogens entering the body through a cut
skin
-prevents fungus/bacteria from growing on your body -provides a physical barrier that pathogens have to get through
Interferon interferes with an infection.
Interferon is similar to the word interference. How can this clue help you remember what interferon means?
mucus membrane
traps pathogens so they cannot enter through the nose
A phagocyte is a cell that eats other cells
The word phagocyte comes from two Greek words: phago- means "to eat" and -cyte means cell. How can this help you remember the definition of the word phagocyte?