Are the three main types of lymphocytes T-cells, B cells, and macrophages?

There are three types of lymphocytes, known as T cells, B cells, and natural killer cells. T cells get their name because they are developed in the thymus gland. These cells are distinguished from other lymphocytes by the specialized T-cell receptor molecule that is located on the surface of the cell. This molecule is important in immunity because it recognizes antigens and is able to bind to them.

B cells are an important part of the immune system. B cells get their name because they mature in the bone marrow of humans, and in the bursa organ of birds. These cells are distinguished from other lymphocytes by a protein on their surface known as the B-cell receptor. This protein is specialized to recognize and attach to specific antigens.

Natural killer cells are lymphocytes that are known to be cytotoxic. This means that they have the ability to kill other cells. These cells are an important part of the immune system because they are able to recognize virally infected cells, as well as some types of tumor cells, and kill them before they cause a great amount of harm.