Other
Hon: T Cell or T Lymphocyte
A very good site that covers the general function of all blood cells.
Biology Pages
Kimball's Biology Pages: T Helper Cells
A good site devoted to the T-cell and its role in the immune response. Complete coverage including vocabulary links throughout.
Biology Pages
Kimball's Biology Pages: B Cells and T Cells
A very strong overview of cell mediated immunity and the roles of the different cells within the system.
Other
Hon: Cd8 Cell
A good description of the function of supressor cells. Abundant hypertext links to vocabulary on the general topic.
Other
Hon: Helper T Cell
A very short, but decent, introduction to the function of the memory cells, this page has abundant links to vocabulary help.
Other
Clermont College: Immune System
A comprehensive site that includes the mention of the different roles the different lymphocytes make.