Question

State and describe the function of the three main types of lymphocytes in our body.

Answer 1

B lymphocytes are cells that are initially produced in the yolk sac, then in the liver (during fetal life), and later in the bone marrow. They are responsible for ensuring the so-called humoral immunity, which stands out for the immune response made by the production of antibodies. These antibodies are capable of neutralizing or even destroying antigens. In addition to antibody production, B lymphocytes act as immune memory cells. These cells are able to react quickly to a new infection with the same antigen. As such, they ensure faster and more effective protection.

T lymphocytes originate from lymphoid progenitor cells found in the bone marrow. These cells leave the marrow towards the thymus. T helper lymphocytes guarantee the differentiation of B lymphocytes into plasma cells, and are therefore important for antibody production. Suppressor T lymphocytes terminate the humoral response, that is, antibody production. T lymphocytes are estimated to represent 65% to 75% of lymphocytes present in a person's blood.

NK cells (also a lymphocyte), or natural killer cells, are part of the innate immune system. These cells are able to distinguish infected or tumor cells and attack them without stimulation. Its immune response is nonspecific, unlike T and B lymphocytes, which produce responses by antigen action.

Answer 2

Explanation:

Lymphocytes are the type of the white blood cell which function as a part of immune system.

Types of Lymphocytes:

T cells

T cells are developed in thymus gland. The specialized molecule of T-cell receptor is located on surface of cell. The molecule is important in the immunity as it recognizes the antigens and thus it to bind to them.

B cells

B cells are important part of immune system. They mature in bone marrow of the humans, and in bursa organ of the birds. The cells have a protein on the surface which is known as B-cell receptor. The protein recognizes and attaches to the specific antigens.

Natural killer cells

Natural killer cells are the lymphocytes which are known to be cytotoxic. They have ability to kill the other cells in the body. The cells are important part of immune system because these cells are able to recognize infected cells.