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Immune System

Immune System Review

TermDefinition
immune system functions (2) 1) Prevent pathogens from entering the human body 2) If a pathogens enters, defend against it
skin Acts like a barrier (not allowing germs to enter) and contains chemicals like sweat and oil (part of the first line of defense)
breathing passages Lined with mucus and cilia which help trap pathogens that are inhaled (part of the first line of defense)
mouth and stomach Contain destructive chemicals to help kill pathogens in the food we eat (part of the first line of defense)
inflammatory response When fluid and white blood cells leak from blood vessels into nearby tissue, causing the area to become red and swollen (second line of defense)
T-cells white blood cells that recognize pathogens based on their antigens
B-cells white blood cells that produce antibodies to help mark and destroy pathogens
antigens molecules on the outside of a pathogen that allow the human body to recognize and identify it
antibodies proteins that bind to the antigen on the outside of a pathogen to mark it for destruction
phagocytes white blood cells that engulf pathogens and destroy them by breaking them down
Created by: jlodico