ANATOMY

Detailed explanation-1: -Lymphocytes. Lymphocytes are B and T cells, white blood cells that are produced from the stem cells in the bone marrow. They provide immunity for future invasions of bacteria, viruses, and parasites by producing antibodies, which have memory and will protect against such antigens.

Detailed explanation-2: -There are two main types of lymphocytes: B cells and T cells. The B cells produce antibodies that are used to attack invading bacteria, viruses, and toxins.

Detailed explanation-3: -B lymphocytes, also called B cells, create a type of protein called an antibody. These antibodies bind to pathogens or to foreign substances, such as toxins, to neutralize them. For example, an antibody can bind to a virus, which prevents it from entering a normal cell and causing infection.

Detailed explanation-4: -Antibodies are produced by B-lymphocytes after differentiation of B-lymphocytes into plasma cells.

Detailed explanation-5: -Human lymphoid organs. Lymphocytes develop in the thymus and bone marrow (yellow), which are therefore called central (or primary) lymphoid organs.