Subpopulations of Lymphocytes Immunology Review 378
Thymus Bone marrow
T Cells
60-80%
B Cells
10-20%
NK
Lymphocytes
< 20%
Lymphocyte
stem cell
T-helper T-suppressor
(From Ciesla B. Hematology in Practice, 2nd ed. Philadelphia: FA Davis; 2012:136.)