Question: what are the two main types of lymphocytes quizlet?
Answer: T cells. thymus dependent circulating lymphocytes, make up 80% of circulating lymphocytes.
B cells. bone marrow-derived circulating lymphocytes, make up 10-15% of circulating lymphocytes.
NK cells. ... 
cytotoxic T cells. ... 
helper T cells. ... 
suppressor T cells. ... 
memory T cells. ... 
plasma cells.