The lines of defense
1. Barriers: skin, breathing passages, mouth and stomach
2. Inflammatory Response: WBC, inflammation, fever
3. Immune System: T cells, B cells
skin, breathing passages, and the mouth and stomach
the first like of defense consists of...
oil and sweat
pathogens usually get killed with natural chemicals that are known as
mucus and cilia in breathing passages (nose mostly) trap________from entering the body
Do sneezing and coughing get rid of pthogens that are trying to enter the body?
saliva or stomach acid
most pathogens you swallow are destroyed by...
the body's second line of defense is called...
to fight pathogens
in the inflammatory reaponse, why do white blood cells leak from blood vessels?
a white blood cell that engulfs pathogens and destroys them
during the inflammatory response, chemicals that are produced lead to a....
the body's third line of defense is called...
the immune system can distinguish different kinds of...
the white blood cells that can distinguish between different pathogens
T cells and B cells
the two kinds of lymphocytes are called:
destroy pathogens by producing proteins
molecules that the immune system recognizes either as part of your body, or coming from outside of your body
proteins that B cells produce
attack the virus, or activate B cells
after a T cell recognizes a virus, they...
attack human immune system directly and destroy T cells
HIV is the only virus known to...
Organs/Tissues of the Immune System
2. Bone Marrow
4. Lymph Nodes
T cells go to school
taught to tell self from non self
cells which can become any other cell
White Blood Cells
3. Natural killer cells
4. T cells
5. B cells
B cells sit and examine things that float past
anything which can infect the body
1. Bacteria/small simple cells
2. Chemicals/bee venom, snake bites
3. Virus/nonliving chemicals which invade cells
4. Parasites/multicellular invaders
Produced by B cells
Goes outside into body fluids
Goes into breast milk
activates mast cells that cause allergic reactions (pollen)
Waste storage depot
1923 Discovered Penicillin
Discovered how to preserve food
Identify invaders: billion
1. some attack invaders
2. some activate B cells
make antibody that "fits" an antigen
Antibodies destroy by clumping the antigens together for the phagocyte to eat/destroy