Question

what are the two types of lymphocytes?
lymph nodes and lymph vessels.
phagocytes and macrophages.
red blood cells and white blood cells.
platelets and plasma cells.
b cells and t cells.

Explanation:

Lymphocytes are a type of white blood cell. The two main types are B cells (which produce antibodies) and T cells (which play roles in cell - mediated immunity). Lymph nodes and lymph vessels are parts of the lymphatic system, not lymphocytes. Phagocytes and macrophages are other types of immune cells but not lymphocytes. Red blood cells carry oxygen, white blood cells are a general category (lymphocytes are a subset). Platelets are involved in blood clotting and plasma cells are a type of B - cell derivative but not the two main types of lymphocytes.

Answer:

B cells and T cells.