What cells do B lymphocytes and T lymphocytes originate from?

Originates from hematopoietic stem cells.

1. ? Lymphocytes mainly play an immune role in specific immunity.

Lymphocytes are differentiated and developed from hematopoietic stem cells in the bone marrow.

Some of the hematopoietic stem cells enter the thymus with the blood flow and develop into lymphocytes in the thymus.

Because the first letter of the English name of the thymus is "T", this type of cells is called T lymphocytes, or T cells for short.

Another part of the hematopoietic stem cells develop into lymphocytes in the bone marrow.

Because the first letter of the English name of bone marrow is "B", this type of cells is called B lymphocytes, or B cells for short.

2. ?During the process of humoral immunity, T cells can play a presenting role and present antigens processed by phagocytes to B cells. After receiving antigen stimulation, B cells begin a series of proliferation and differentiation to form effector B cells and

Antibodies produced by memory cells and effector B cells can specifically bind to the corresponding antigens to exert immune effects.

3. In the process of cellular immunity, after receiving antigen stimulation, T cells begin to undergo a series of proliferation and differentiation to form effector T cells and memory cells. The effector T cells are in close contact with the host cells invaded by the antigen (i.e., target cells).

, activates lysosomal enzymes in the target cells, changes the permeability of the target cells, changes the osmotic pressure, and ultimately leads to the lysis and death of the target cells.

Antigens in cells also lose their hiding place and are destroyed by antibodies.

Both T lymphocytes and B lymphocytes are derived from bone marrow hematopoietic stem cells.

4. Different functions. T lymphocytes can produce effector T cells. At the same time, T lymphocytes have the function of presenting antigens to B lymphocytes to produce effector B cells during the induction phase of humoral immunity. A, B lymphocytes and T lymphocytes

Cells are derived from hematopoietic stem cells. B lymphocytes mature in the bone marrow, and T lymphocytes mature in the thymus. After B lymphocytes are stimulated by antigens, they proliferate and differentiate to form effector B cells, which then produce specific antibodies. Only T lymphocytes

After mature development in the thymus, humoral immunity works through the production of antibodies by plasma cells, while cellular immunity relies on effector T cells to play an immune role.