Normal Immune System
DR A.Z Bukar
Consultant Histopathologist
1
, Normal Immune system
• The term Immunity is derived from the Latin
word Immunitae, which referred to the
protection from the legal prosecution offered
to Roman Senators during their tenure in
office.
• In medicine it refers to the resistance
exhibited by the host towards injury caused by
microorganisms and their products.
2
, Cont.
• Immunity has the following function;
1. Protection against infectious diseases
2. Eliminate potentially destructive foreign
substances from body
3. Distinguishes self from non-self
3
, Organs of immune system
• Primary lymphoid organs
– Thymus
– Bone marrow
• Secondary lymphoid organs
– Lymph nodes
– Spleen
– MALT(mucosa associated lymphoid Tissue located
in the respiratory tract and gastrointestinal tract)
– Skin Associated Lymphoid Tissue (SALT)
4
DR A.Z Bukar
Consultant Histopathologist
1
, Normal Immune system
• The term Immunity is derived from the Latin
word Immunitae, which referred to the
protection from the legal prosecution offered
to Roman Senators during their tenure in
office.
• In medicine it refers to the resistance
exhibited by the host towards injury caused by
microorganisms and their products.
2
, Cont.
• Immunity has the following function;
1. Protection against infectious diseases
2. Eliminate potentially destructive foreign
substances from body
3. Distinguishes self from non-self
3
, Organs of immune system
• Primary lymphoid organs
– Thymus
– Bone marrow
• Secondary lymphoid organs
– Lymph nodes
– Spleen
– MALT(mucosa associated lymphoid Tissue located
in the respiratory tract and gastrointestinal tract)
– Skin Associated Lymphoid Tissue (SALT)
4
