The 3 lines of defense in a body
First line of defense (natural
barrier)
Second line of defense
(inflammatory reaction)
Its nonspecific
It's nonspecific because it is
the same no matter what the
pathogen is
It prevents the entry of pathogen
The organs of this lines are: skinsaliva-mucus- cilia- stomach acidtiny hairs-tears-earwax.
Alerts the body about a
pathogen invasion
The effector cells are the
macrophages and
granulocytes.
The last step in an inflammatory
reaction is phagocytosis
Third line of defense (specific
immune response)
Cell mediated specific
immune response
Humoral specific
immune response
T cells are the effectors
cells
B cells are the
effectors cells
Responsible for killing a
rejected graft
Responsible for the
failure of blood
transfusion
Specific since the cells bind to a
specific antigen (key-lock action)