1st Line Defense
What does the 1st line of defense have to prevent pathogens from entering your body's cells?
barriers
What is the 2nd line of defense known as?
inflammatory response
What is the third line of defense also known as?
immune response
What is a pathogen?
bacteria, virus, or other microorganism that can make you sick
What is AIDS?
disease caused by a virus that attacks the immune system
What does the skin do?
Physical and chemical barrier
What do white blood cells do?
fight pathogens
(DOUBLE POINTS!!)
What are lymphocytes?
White blood cells that target a specific pathogen (a type of phagocyte)
What are lymphocytes?
White blood cells that target specific pathogens
What is the only virus that can attack the immune system directly and destroy T-cells?
HIV
What does the mouth do?
Sneezing and coughing removes pathogens
What are phagocytes?
white blood cells that are involved in inflammatory response
What are the 2 major types of lymphocytes?
T-Cells and B-cells
What is an Antigen?
molecules on the surface of pathogens that the immune system recognizes as being a part of your body or being from outside of your body (the tag!) (DOUBLE POINTS!!)
Exchange of bodily fluids
What does the stomach do?
When you swallow... pathogens are destroyed by stomach acid in stomach (and saliva)
Symptoms of an inflammatory response
Fever, redness, swelling, warmth, irritation
What do B-cells do?
produces antibodies
(DOUBLE POINTS!!)
Antibodies
inactivate pathogens by binding to the antigen and marking the pathogen for destruction
Why do you need your immune system?
To fight off pathogens that make you sick so you get better
DOUBLE POINTS!!
How do the breathing passages defend against pathogens?
Mucus and cilia trap and remove most pathogens (DOUBLE POINTS!!)
it eats/engulfs it and breaks it down (just like when you eat something!)
What do T-cells do?
identify pathogens with their antigens
What is HIV and what does it do?
The only virus known to attack the immune system. It causes the body to lose its ability to fight off being sick
What can be a pathogen (name 2)
Bacteria, virus, fungi, protozoa, and any microorganism that can make you sick
(TRIPLE POINTS!!)