Introduction to Immunology Flashcards
Immunity
Body’s ability to resist infection (body learning from experience of past infections)
Immune response
Reaction of the body following an exposure to foreign antigen then forming antibodies and lymphokines
Microorganisms
Bacteria, virus and parasite that causes disease in humans and animals
Enters the body @ diff sites and produce disease symptoms
Bursa of Fabricus
Produces B cells in chickens because bone marrow not active
Where is the harderian gland in chickens?
Peripheral lymphoid organ @ orbit behind the eye
Harderian gland function
Immunological defense of the para ocular region
Producing lacrimal fluid
Thymus
Located in the neck of birds
Produces and matures T lymphocytes
Cecal tonsils
Located @ the cecum-rectum junction
Largest lymphoid collections of avian gut-associated lymphoid tissue
What are the functions of cecal tonsils?
Protective immune responses against bacterial and viral pathogens in intestinal tract
What immune organ don’t fish have?
A functional bone marrow
Where does hematopoiesis happen in the fish?
Spleen, kidney, intestinal submucosa and thymus
Bone marrow
Center of most bones with BVs
Red and yellow bone marrow (fat)
Red bone marrow
Contains blood stem cells that become RBCs, WBCs or platelets
What are the functions of the spleen?
Stores and filters blood
Makes WBCs and antibodies
Maintains fluid levels in your body
How does the spleen filter blood?
By moving cellular waste and getting rid of old or damaged blood cells
