The specific immunity of the immune system is called into action when nonspecific defenses are not enough. It mounts attacks against specific foreign substances through self/non-self discrimination and stimulating lymphocytes when nonself bodies are detected. Effector cells then seek and destroy foreign materials while memory cells become dormant but can be triggered to respond rapidly if the pathogen is encountered again, demonstrating the immune system's memory.

1. Immune
System
Third Line of Defense
– Specific Immunity

2.  called into action when
nonspecific methods are not
enough and infection becomes
widespread

3. FUNCTION
 mounts attacks against
specific foreign substances
specific
foreign
substances

4. FEATURES…
…

5.  Self/non-self discrimination
- it normally distinguishes between self
and non-self and only reacts against
non-self.
non-self

6.  When a nonself (foreign) body
is detected, mitotic activity
in B and T lymphocytes is
stimulated

7.  Whilemitosis is occurring, the
daughter populations become
subdivided into…