Lymphocytes are mononucleate, nongranular leukocytes of lymphoid tissue, participating in immunity. They are found in blood, lymph and lymphoid tissues such as spleen, lymph nodes, tonsils, Peyer’s patches, appendix. etc.
The lymphocytes are of two types. They are B lymphocytes and T lymphocytes.
Similarities between B cells and T cells
1. Both are
White blood cells or Lymphocytes.
2. In
adults, both cells are
derived from hematopoietic stem cells in the bone marrow but maturation of T cells occur in
Thymus.
3. During
embryonic development, these cells develop from the stem cells of liver and
yolk sac.
3. Both are
involved in acquired or adaptive immunity or specific immune response.
4. Both possess antigen binding cell surface
receptors B cell receptor (BCR) and T-cell receptor (TCR) responsible for
specificity, diversity memory and self/non-self recognition by the immune
system.
5. Both
produce memory cells Memory B cells and Memory T cells responsible for
immunologic memory in Adaptive immunity.