17 Differences between B Cells and T Cells (B Cells vs T Cells)

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Last Updated on July 8, 2020 by Sagar Aryal

Differences between B Cells and T Cells

Differences between B Cells and T Cells

The major differences between them are:

S.N.CharacteristicsB  lymphocytes (B cells)T lymphocytes (T cells)
1.Site of MaturationB lymphocytes both originate and mature in the bone marrow.T lymphocytes mature in the thymus after its origination in the bone marrow.
2.PositionMature B cells occur mostly outside the lymph node.Mature T cells occur mostly inside the lymph node.
3.DistributionGerminal centers of lymph nodes, spleen, gut, respiratory tract; also subcapsular and medullary cords of lymph nodes.Parafollicular areas of cortex in lymph nodes, periarteriolar in the spleen.
.4.ReceptorsThe B-cell receptors (BCRs) constitute of membrane antibodies known as immunoglobulin surface receptors.Surface receptors are called T-cell receptors (TCRs) and differ from membrane antibodies.
5.Binds withExtracellular antigens such as bacteria, free viruses and other circulating free foreign material.The foreign antigen in association with self-antigen only such as a virus-infected cell.
6.The need of Antigen ProcessingAntigen processing is not necessary.Antigen processing is necessary.
7.ConnectionThey bind directly with the antigens on the surface of the invading virus or bacteria.They can only bind to antigens on the outside of infected cells and not directly.
8.C3 complement receptorReceptors for C3 complement present.Receptors for the C3 complement are absent.
9.Cell Surface MarkerCD19 is the cell surface markers of B cells.CD3 is the cell surface markers of T cells.
10.Microvilli on the cell surfacePresentAbsent
11.Types of Active CellsThey differentiate into plasma cells and memory cells.They differentiate into many subsets of T cells such as Cytotoxic T cells (CD8+ T cells), Helper T cells (CD4+ T cells) and suppressors cells along with memory cells.
12.AbundanceIt constitutes about 20% of lymphocytes in the blood.It constitutes about 80% of lymphocytes in the blood.
13.Secretory ProductAntibodies are the chief secretory product of B cells.Cytokines (lymphokines) are the chief secretory product of T cells.
14.Type of ImmunityInvolved in humoral (antibody-mediated) immunity.Involved in cell-mediated immunity.
15.Life SpanThey have comparatively a shorter life span.They have a comparatively longer life span.
16.RelationshipSince B cells are also Antigen Presenting cells, they present antigens to T-cells.They help to activate B cells and aid in antibody production against antigens which are T-dependent.
17.FunctionsHelp eliminate free foreign invaders by enhancing immune responses against them; provide immunity against most foreign antigens and bacteria.Help lyse virus-infected cells and tumor cells; provide immunity against most viruses and intracellular bacterial pathogens; help B cells in antibody production.

References

  1. https://microbiologyinfo.com/differences-between-b-cells-and-t-cells/
  2. http://education.seattlepi.com/functional-difference-between-t-cells-b-cells-4573.html
  3. http://pediaa.com/difference-between-t-cells-and-b-cells/
  4. Lydyard, P.M., Whelan,A.,& Fanger,M.W. (2005).Immunology (2 ed.).London: BIOS Scientific Publishers.

Differences between B Cells and T Cells

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