Belongs to HUBS, Lecture 30: Introduction to immunology and immune system Flashcards
what is immunology
the study of an organism’s immune system in health and disease
the immune system is composed of:
- organs
- cells
- molecules
what is the immune system
organised system of organs cells and molecules that interact to defend the body against disease
examples of diseases affected by immune responses
- infectious disease
- inflammatory disease
- cancer
examples of microbes
- viruses (smallest)
- bacteria
- fungi
- protozoa (biggest)
pathogens are
disease causing microbes
two classifications of immune system organs
- primary/secondary lymphoid organs
activity occurring in primary lymphoid organs
production of white cells (lymphocytes)
activity occurring in secondary lymphoid organs
site where immune responses are initiated
primary lymphoid organs include
- thymus
- bone marrow
thymus function
- ‘school’ for white blood cells called T cells
- developing T cells learn not to react to itself
bone marrow function
source of stem cells that develop into cells of the innate/adaptive immune response
bone marrow stem cells are
pluripotent
secondary lymphoid organs include
- spleen
- lymph nodes
spleen function
site of initiation for immune responses against blood-born pathogens