Primary
Lymphoid Tissue
Primary Lymphoid Tissue:
1.Definition:
tissue in
which maturation and differentiation of lymphocytes occurs.
2.Bone Marrow
˜all cells of
immune system are derived from an undifferentiated stem cell
˜process is
called hematopoiesis
˜B lymphocytes
mature and differentiate in the bone marrow
3.Thymus gland
The T
lymphocytes are formed in bone marrow but mature and differentiate in the thymus gland
