Primary Lymphoid Organs (Example: Thymus, Bone marrow, Bursa of Fabricius)
1. The lymphoid stem cells proliferate, differentiate and mature
2. Contain either B cells or Tcells
3. Antigen cannot enter in
4.They atrophy with age
1. The lymphoid cells become functional
2. Contain both T and B cells.
3. Antigen enters in and stimulates the lymphoid cells
4. They increase in size with age
1. The lymphoid stem cells proliferate, differentiate and mature
2. Contain either B cells or Tcells
3. Antigen cannot enter in
4.They atrophy with age
1. The lymphoid cells become functional
2. Contain both T and B cells.
3. Antigen enters in and stimulates the lymphoid cells
4. They increase in size with age