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Immune System
Immune System Review
Term | Definition |
---|---|
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 |