PRIMARY LYMPHOID ORGANS Flashcards
What are the 2 organs under primary lymphoid organs?
Bone marrow and Thymus
The bone marrow is the site of ________________?
Intramedullary hematopoiesis
What does the BM produces?
Precursor cell of lymohocytes
The bone marrow is also a site for___________________ and _________________
T cell progenitor production
B cell maturation
The BM is the center for _______________
Ag-Ab lymphopoiesis
Hematopoiesis happens in what particular bone structure of children and adults?
Children : Long bones
Adult: Flat bones
The B cells are considered _______?
Naive B cells
This are the cells that is not yet stimulated by antigen
Naive B cells
This organ is made up of epithelial cells
Thymus
The thymus is divided into 2. What are these?
Cortex and Medulla
This is the outer layer of the thymus where the lymphocyte mature until a certain point ONLY
Cortex
This is the inner layer of the thymus where finalization and differentiation of lymphocytes happens
Medulla
Mature T-cells will migrate the circulation after _______?
3 weeks
This is a flat, bilobed organ situated above the heart and between the lungs.
Thymus