Question

What does the term ‘memory' of the Immune system mean?

Answer 1

Property of immune system :

Immune system has the following properties:
$\bullet$ Specificity
$\bullet$ Ability to distinguish between self and non-self molecules
$\bullet$ Memory

Effector and memory cells:

When the naive B cells and T cells come in contact with the antigen for the first time, they simultaneously produce effector cells (which eliminates the antigens) as well as long-lived memory cells.



During a second contact with the same kind of antigen, the memory cells recognise it, leading to a quicker and heightened immune response.